diff --git a/git-gui.sh b/git-gui.sh
index 6f47624b2c..5749547585 100755
--- a/git-gui.sh
+++ b/git-gui.sh
@@ -677,12 +677,17 @@ if {[is_Windows]} {
 ## config defaults
 
 set cursor_ptr arrow
-font create font_diff -family Courier -size 10
 font create font_ui
-catch {
-	label .dummy
-	eval font configure font_ui [font actual [.dummy cget -font]]
-	destroy .dummy
+if {[lsearch -exact [font names] TkDefaultFont] != -1} {
+	eval [linsert [font actual TkDefaultFont] 0 font configure font_ui]
+	eval [linsert [font actual TkFixedFont] 0 font create font_diff]
+} else {
+	font create font_diff -family Courier -size 10
+	catch {
+		label .dummy
+		eval font configure font_ui [font actual [.dummy cget -font]]
+		destroy .dummy
+	}
 }
 
 font create font_uiitalic
@@ -697,6 +702,9 @@ foreach class {Button Checkbutton Entry Label
 }
 if {![is_MacOSX]} {
 	option add *Menu.font font_ui
+	option add *Entry.borderWidth 1 startupFile
+	option add *Entry.relief sunken startupFile
+	option add *RadioButton.anchor w startupFile
 }
 unset class
 
@@ -749,6 +757,18 @@ proc apply_config {} {
 		font configure ${font}bold -weight bold
 		font configure ${font}italic -slant italic
 	}
+
+	global use_ttk NS
+	set use_ttk 0
+	set NS {}
+	if {$repo_config(gui.usettk)} {
+		set use_ttk [package vsatisfies [package provide Tk] 8.5]
+		if {$use_ttk} {
+			set NS ttk
+			bind [winfo class .] <<ThemeChanged>> [list InitTheme]
+			pave_toplevel .
+		}
+	}
 }
 
 set default_config(branch.autosetupmerge) true
@@ -775,6 +795,7 @@ set default_config(gui.fontui) [font configure font_ui]
 set default_config(gui.fontdiff) [font configure font_diff]
 # TODO: this option should be added to the git-config documentation
 set default_config(gui.maxfilesdisplayed) 5000
+set default_config(gui.usettk) 1
 set font_descs {
 	{fontui   font_ui   {mc "Main Font"}}
 	{fontdiff font_diff {mc "Diff/Console Font"}}
@@ -2093,7 +2114,7 @@ proc do_quit {{rc {1}}} {
 	global ui_comm is_quitting repo_config commit_type
 	global GITGUI_BCK_exists GITGUI_BCK_i
 	global ui_comm_spell
-	global ret_code
+	global ret_code use_ttk
 
 	if {$is_quitting} return
 	set is_quitting 1
@@ -2151,8 +2172,13 @@ proc do_quit {{rc {1}}} {
 		}
 		set cfg_geometry [list]
 		lappend cfg_geometry [wm geometry .]
-		lappend cfg_geometry [lindex [.vpane sash coord 0] 0]
-		lappend cfg_geometry [lindex [.vpane.files sash coord 0] 1]
+		if {$use_ttk} {
+			lappend cfg_geometry [.vpane sashpos 0]
+			lappend cfg_geometry [.vpane.files sashpos 0]
+		} else {
+			lappend cfg_geometry [lindex [.vpane sash coord 0] 0]
+			lappend cfg_geometry [lindex [.vpane.files sash coord 0] 1]
+		}
 		if {[catch {set rc_geometry $repo_config(gui.geometry)}]} {
 			set rc_geometry {}
 		}
@@ -2919,14 +2945,13 @@ default {
 
 # -- Branch Control
 #
-frame .branch \
-	-borderwidth 1 \
-	-relief sunken
-label .branch.l1 \
+${NS}::frame .branch
+if {!$use_ttk} {.branch configure -borderwidth 1 -relief sunken}
+${NS}::label .branch.l1 \
 	-text [mc "Current Branch:"] \
 	-anchor w \
 	-justify left
-label .branch.cb \
+${NS}::label .branch.cb \
 	-textvariable current_branch \
 	-anchor w \
 	-justify left
@@ -2936,15 +2961,20 @@ pack .branch -side top -fill x
 
 # -- Main Window Layout
 #
-panedwindow .vpane -orient horizontal
-panedwindow .vpane.files -orient vertical
-.vpane add .vpane.files -sticky nsew -height 100 -width 200
+${NS}::panedwindow .vpane -orient horizontal
+${NS}::panedwindow .vpane.files -orient vertical
+if {$use_ttk} {
+	.vpane add .vpane.files
+} else {
+	.vpane add .vpane.files -sticky nsew -height 100 -width 200
+}
 pack .vpane -anchor n -side top -fill both -expand 1
 
 # -- Index File List
 #
-frame .vpane.files.index -height 100 -width 200
-label .vpane.files.index.title -text [mc "Staged Changes (Will Commit)"] \
+${NS}::frame .vpane.files.index -height 100 -width 200
+tlabel .vpane.files.index.title \
+	-text [mc "Staged Changes (Will Commit)"] \
 	-background lightgreen -foreground black
 text $ui_index -background white -foreground black \
 	-borderwidth 0 \
@@ -2954,8 +2984,8 @@ text $ui_index -background white -foreground black \
 	-xscrollcommand {.vpane.files.index.sx set} \
 	-yscrollcommand {.vpane.files.index.sy set} \
 	-state disabled
-scrollbar .vpane.files.index.sx -orient h -command [list $ui_index xview]
-scrollbar .vpane.files.index.sy -orient v -command [list $ui_index yview]
+${NS}::scrollbar .vpane.files.index.sx -orient h -command [list $ui_index xview]
+${NS}::scrollbar .vpane.files.index.sy -orient v -command [list $ui_index yview]
 pack .vpane.files.index.title -side top -fill x
 pack .vpane.files.index.sx -side bottom -fill x
 pack .vpane.files.index.sy -side right -fill y
@@ -2963,8 +2993,8 @@ pack $ui_index -side left -fill both -expand 1
 
 # -- Working Directory File List
 #
-frame .vpane.files.workdir -height 100 -width 200
-label .vpane.files.workdir.title -text [mc "Unstaged Changes"] \
+${NS}::frame .vpane.files.workdir -height 100 -width 200
+tlabel .vpane.files.workdir.title -text [mc "Unstaged Changes"] \
 	-background lightsalmon -foreground black
 text $ui_workdir -background white -foreground black \
 	-borderwidth 0 \
@@ -2974,15 +3004,19 @@ text $ui_workdir -background white -foreground black \
 	-xscrollcommand {.vpane.files.workdir.sx set} \
 	-yscrollcommand {.vpane.files.workdir.sy set} \
 	-state disabled
-scrollbar .vpane.files.workdir.sx -orient h -command [list $ui_workdir xview]
-scrollbar .vpane.files.workdir.sy -orient v -command [list $ui_workdir yview]
+${NS}::scrollbar .vpane.files.workdir.sx -orient h -command [list $ui_workdir xview]
+${NS}::scrollbar .vpane.files.workdir.sy -orient v -command [list $ui_workdir yview]
 pack .vpane.files.workdir.title -side top -fill x
 pack .vpane.files.workdir.sx -side bottom -fill x
 pack .vpane.files.workdir.sy -side right -fill y
 pack $ui_workdir -side left -fill both -expand 1
 
-.vpane.files add .vpane.files.workdir -sticky nsew
-.vpane.files add .vpane.files.index -sticky nsew
+.vpane.files add .vpane.files.workdir
+.vpane.files add .vpane.files.index
+if {!$use_ttk} {
+	.vpane.files paneconfigure .vpane.files.workdir -sticky news
+	.vpane.files paneconfigure .vpane.files.index -sticky news
+}
 
 foreach i [list $ui_index $ui_workdir] {
 	rmsel_tag $i
@@ -2992,68 +3026,69 @@ unset i
 
 # -- Diff and Commit Area
 #
-frame .vpane.lower -height 300 -width 400
-frame .vpane.lower.commarea
-frame .vpane.lower.diff -relief sunken -borderwidth 1
+${NS}::frame .vpane.lower -height 300 -width 400
+${NS}::frame .vpane.lower.commarea
+${NS}::frame .vpane.lower.diff -relief sunken -borderwidth 1
 pack .vpane.lower.diff -fill both -expand 1
 pack .vpane.lower.commarea -side bottom -fill x
-.vpane add .vpane.lower -sticky nsew
+.vpane add .vpane.lower
+if {!$use_ttk} {.vpane paneconfigure .vpane.lower -sticky nsew}
 
 # -- Commit Area Buttons
 #
-frame .vpane.lower.commarea.buttons
-label .vpane.lower.commarea.buttons.l -text {} \
+${NS}::frame .vpane.lower.commarea.buttons
+${NS}::label .vpane.lower.commarea.buttons.l -text {} \
 	-anchor w \
 	-justify left
 pack .vpane.lower.commarea.buttons.l -side top -fill x
 pack .vpane.lower.commarea.buttons -side left -fill y
 
-button .vpane.lower.commarea.buttons.rescan -text [mc Rescan] \
+${NS}::button .vpane.lower.commarea.buttons.rescan -text [mc Rescan] \
 	-command ui_do_rescan
 pack .vpane.lower.commarea.buttons.rescan -side top -fill x
 lappend disable_on_lock \
 	{.vpane.lower.commarea.buttons.rescan conf -state}
 
-button .vpane.lower.commarea.buttons.incall -text [mc "Stage Changed"] \
+${NS}::button .vpane.lower.commarea.buttons.incall -text [mc "Stage Changed"] \
 	-command do_add_all
 pack .vpane.lower.commarea.buttons.incall -side top -fill x
 lappend disable_on_lock \
 	{.vpane.lower.commarea.buttons.incall conf -state}
 
 if {![is_enabled nocommitmsg]} {
-	button .vpane.lower.commarea.buttons.signoff -text [mc "Sign Off"] \
+	${NS}::button .vpane.lower.commarea.buttons.signoff -text [mc "Sign Off"] \
 		-command do_signoff
 	pack .vpane.lower.commarea.buttons.signoff -side top -fill x
 }
 
-button .vpane.lower.commarea.buttons.commit -text [commit_btn_caption] \
+${NS}::button .vpane.lower.commarea.buttons.commit -text [commit_btn_caption] \
 	-command do_commit
 pack .vpane.lower.commarea.buttons.commit -side top -fill x
 lappend disable_on_lock \
 	{.vpane.lower.commarea.buttons.commit conf -state}
 
 if {![is_enabled nocommit]} {
-	button .vpane.lower.commarea.buttons.push -text [mc Push] \
+	${NS}::button .vpane.lower.commarea.buttons.push -text [mc Push] \
 		-command do_push_anywhere
 	pack .vpane.lower.commarea.buttons.push -side top -fill x
 }
 
 # -- Commit Message Buffer
 #
-frame .vpane.lower.commarea.buffer
-frame .vpane.lower.commarea.buffer.header
+${NS}::frame .vpane.lower.commarea.buffer
+${NS}::frame .vpane.lower.commarea.buffer.header
 set ui_comm .vpane.lower.commarea.buffer.t
 set ui_coml .vpane.lower.commarea.buffer.header.l
 
 if {![is_enabled nocommit]} {
-	radiobutton .vpane.lower.commarea.buffer.header.new \
+	${NS}::radiobutton .vpane.lower.commarea.buffer.header.new \
 		-text [mc "New Commit"] \
 		-command do_select_commit_type \
 		-variable selected_commit_type \
 		-value new
 	lappend disable_on_lock \
 		[list .vpane.lower.commarea.buffer.header.new conf -state]
-	radiobutton .vpane.lower.commarea.buffer.header.amend \
+	${NS}::radiobutton .vpane.lower.commarea.buffer.header.amend \
 		-text [mc "Amend Last Commit"] \
 		-command do_select_commit_type \
 		-variable selected_commit_type \
@@ -3062,7 +3097,7 @@ if {![is_enabled nocommit]} {
 		[list .vpane.lower.commarea.buffer.header.amend conf -state]
 }
 
-label $ui_coml \
+${NS}::label $ui_coml \
 	-anchor w \
 	-justify left
 proc trace_commit_type {varname args} {
@@ -3094,7 +3129,7 @@ text $ui_comm -background white -foreground black \
 	-width $repo_config(gui.commitmsgwidth) -height 9 -wrap none \
 	-font font_diff \
 	-yscrollcommand {.vpane.lower.commarea.buffer.sby set}
-scrollbar .vpane.lower.commarea.buffer.sby \
+${NS}::scrollbar .vpane.lower.commarea.buffer.sby \
 	-command [list $ui_comm yview]
 pack .vpane.lower.commarea.buffer.header -side top -fill x
 pack .vpane.lower.commarea.buffer.sby -side right -fill y
@@ -3160,19 +3195,19 @@ proc trace_current_diff_path {varname args} {
 }
 trace add variable current_diff_path write trace_current_diff_path
 
-frame .vpane.lower.diff.header -background gold
-label .vpane.lower.diff.header.status \
+gold_frame .vpane.lower.diff.header
+tlabel .vpane.lower.diff.header.status \
 	-background gold \
 	-foreground black \
 	-width $max_status_desc \
 	-anchor w \
 	-justify left
-label .vpane.lower.diff.header.file \
+tlabel .vpane.lower.diff.header.file \
 	-background gold \
 	-foreground black \
 	-anchor w \
 	-justify left
-label .vpane.lower.diff.header.path \
+tlabel .vpane.lower.diff.header.path \
 	-background gold \
 	-foreground black \
 	-anchor w \
@@ -3196,7 +3231,7 @@ bind_button3 .vpane.lower.diff.header.path "tk_popup $ctxm %X %Y"
 
 # -- Diff Body
 #
-frame .vpane.lower.diff.body
+${NS}::frame .vpane.lower.diff.body
 set ui_diff .vpane.lower.diff.body.t
 text $ui_diff -background white -foreground black \
 	-borderwidth 0 \
@@ -3205,9 +3240,9 @@ text $ui_diff -background white -foreground black \
 	-xscrollcommand {.vpane.lower.diff.body.sbx set} \
 	-yscrollcommand {.vpane.lower.diff.body.sby set} \
 	-state disabled
-scrollbar .vpane.lower.diff.body.sbx -orient horizontal \
+${NS}::scrollbar .vpane.lower.diff.body.sbx -orient horizontal \
 	-command [list $ui_diff xview]
-scrollbar .vpane.lower.diff.body.sby -orient vertical \
+${NS}::scrollbar .vpane.lower.diff.body.sby -orient vertical \
 	-command [list $ui_diff yview]
 pack .vpane.lower.diff.body.sbx -side bottom -fill x
 pack .vpane.lower.diff.body.sby -side right -fill y
@@ -3428,12 +3463,17 @@ $main_status show [mc "Initializing..."]
 catch {
 set gm $repo_config(gui.geometry)
 wm geometry . [lindex $gm 0]
-.vpane sash place 0 \
-	[lindex $gm 1] \
-	[lindex [.vpane sash coord 0] 1]
-.vpane.files sash place 0 \
-	[lindex [.vpane.files sash coord 0] 0] \
-	[lindex $gm 2]
+if {$use_ttk} {
+	.vpane sashpos 0 [lindex $gm 1]
+	.vpane.files sashpos 0 [lindex $gm 2]
+} else {
+	.vpane sash place 0 \
+		[lindex $gm 1] \
+		[lindex [.vpane sash coord 0] 1]
+	.vpane.files sash place 0 \
+		[lindex [.vpane.files sash coord 0] 0] \
+		[lindex $gm 2]
+}
 unset gm
 }
 
@@ -3701,3 +3741,9 @@ if {[is_enabled retcode]} {
 if {$picked && [is_config_true gui.autoexplore]} {
 	do_explore
 }
+
+# Local variables:
+# mode: tcl
+# indent-tabs-mode: t
+# tab-width: 4
+# End:
diff --git a/lib/about.tcl b/lib/about.tcl
index 241ab892cd..cfa50fca87 100644
--- a/lib/about.tcl
+++ b/lib/about.tcl
@@ -4,31 +4,26 @@
 proc do_about {} {
 	global appvers copyright oguilib
 	global tcl_patchLevel tk_patchLevel
-	global ui_comm_spell
+	global ui_comm_spell NS use_ttk
 
 	set w .about_dialog
-	toplevel $w
+	Dialog $w
 	wm geometry $w "+[winfo rootx .]+[winfo rooty .]"
 
 	pack [git_logo $w.git_logo] -side left -fill y -padx 10 -pady 10
-	label $w.header -text [mc "About %s" [appname]] \
-		-font font_uibold
+	${NS}::label $w.header -text [mc "About %s" [appname]] \
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.close -text {Close} \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.close -text {Close} \
 		-default active \
 		-command [list destroy $w]
 	pack $w.buttons.close -side right
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	label $w.desc \
-		-text "[mc "git-gui - a graphical user interface for Git."]\n$copyright" \
-		-padx 5 -pady 5 \
-		-justify left \
-		-anchor w \
-		-borderwidth 1 \
-		-relief solid
+	paddedlabel $w.desc \
+		-text "[mc "git-gui - a graphical user interface for Git."]\n$copyright"
 	pack $w.desc -side top -fill x -padx 5 -pady 5
 
 	set v {}
@@ -52,22 +47,10 @@ proc do_about {} {
 	append d "git exec dir: [gitexec]\n"
 	append d "git-gui lib: $oguilib"
 
-	label $w.vers \
-		-text $v \
-		-padx 5 -pady 5 \
-		-justify left \
-		-anchor w \
-		-borderwidth 1 \
-		-relief solid
+	paddedlabel $w.vers -text $v
 	pack $w.vers -side top -fill x -padx 5 -pady 5
 
-	label $w.dirs \
-		-text $d \
-		-padx 5 -pady 5 \
-		-justify left \
-		-anchor w \
-		-borderwidth 1 \
-		-relief solid
+	paddedlabel $w.dirs -text $d
 	pack $w.dirs -side top -fill x -padx 5 -pady 5
 
 	menu $w.ctxm -tearoff 0
diff --git a/lib/blame.tcl b/lib/blame.tcl
index 8525b79aaa..786b50b8c2 100644
--- a/lib/blame.tcl
+++ b/lib/blame.tcl
@@ -61,7 +61,7 @@ field tooltip_timer     {} ; # Current timer event for our tooltip
 field tooltip_commit    {} ; # Commit(s) in tooltip
 
 constructor new {i_commit i_path i_jump} {
-	global cursor_ptr M1B M1T have_tk85
+	global cursor_ptr M1B M1T have_tk85 use_ttk NS
 	variable active_color
 	variable group_colors
 
@@ -73,15 +73,15 @@ constructor new {i_commit i_path i_jump} {
 
 	set font_w [font measure font_diff "0"]
 
-	frame $w.header -background gold
-	label $w.header.commit_l \
+	gold_frame $w.header
+	tlabel $w.header.commit_l \
 		-text [mc "Commit:"] \
 		-background gold \
 		-foreground black \
 		-anchor w \
 		-justify left
 	set w_back $w.header.commit_b
-	label $w_back \
+	tlabel $w_back \
 		-image ::blame::img_back_arrow \
 		-borderwidth 0 \
 		-relief flat \
@@ -94,20 +94,20 @@ constructor new {i_commit i_path i_jump} {
 			[cb _history_menu]
 		}
 		"
-	label $w.header.commit \
+	tlabel $w.header.commit \
 		-textvariable @commit \
 		-background gold \
 		-foreground black \
 		-anchor w \
 		-justify left
-	label $w.header.path_l \
+	tlabel $w.header.path_l \
 		-text [mc "File:"] \
 		-background gold \
 		-foreground black \
 		-anchor w \
 		-justify left
 	set w_path $w.header.path
-	label $w_path \
+	tlabel $w_path \
 		-background gold \
 		-foreground black \
 		-anchor w \
@@ -209,10 +209,10 @@ constructor new {i_commit i_path i_jump} {
 
 	set w_columns [list $w_amov $w_asim $w_line $w_file]
 
-	scrollbar $w.file_pane.out.sbx \
+	${NS}::scrollbar $w.file_pane.out.sbx \
 		-orient h \
 		-command [list $w_file xview]
-	scrollbar $w.file_pane.out.sby \
+	${NS}::scrollbar $w.file_pane.out.sby \
 		-orient v \
 		-command [list scrollbar2many $w_columns yview]
 	eval grid $w_columns $w.file_pane.out.sby -sticky nsew
@@ -254,10 +254,10 @@ constructor new {i_commit i_path i_jump} {
 		-background $active_color \
 		-font font_ui
 	$w_cviewer tag raise sel
-	scrollbar $w.file_pane.cm.sbx \
+	${NS}::scrollbar $w.file_pane.cm.sbx \
 		-orient h \
 		-command [list $w_cviewer xview]
-	scrollbar $w.file_pane.cm.sby \
+	${NS}::scrollbar $w.file_pane.cm.sby \
 		-orient v \
 		-command [list $w_cviewer yview]
 	pack $w.file_pane.cm.sby -side right -fill y
diff --git a/lib/branch_checkout.tcl b/lib/branch_checkout.tcl
index 6603703ea1..2e459a8297 100644
--- a/lib/branch_checkout.tcl
+++ b/lib/branch_checkout.tcl
@@ -10,21 +10,24 @@ field opt_fetch     1; # refetch tracking branch if used?
 field opt_detach    0; # force a detached head case?
 
 constructor dialog {} {
-	make_toplevel top w
+	global use_ttk NS
+	make_dialog top w
+	wm withdraw $w
 	wm title $top [append "[appname] ([reponame]): " [mc "Checkout Branch"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 	}
 
-	label $w.header -text [mc "Checkout Branch"] -font font_uibold
+	${NS}::label $w.header -text [mc "Checkout Branch"] \
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.create -text [mc Checkout] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.create -text [mc Checkout] \
 		-default active \
 		-command [cb _checkout]
 	pack $w.buttons.create -side right
-	button $w.buttons.cancel -text [mc Cancel] \
+	${NS}::button $w.buttons.cancel -text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
@@ -33,14 +36,14 @@ constructor dialog {} {
 	$w_rev bind_listbox <Double-Button-1> [cb _checkout]
 	pack $w.rev -anchor nw -fill both -expand 1 -pady 5 -padx 5
 
-	labelframe $w.options -text [mc Options]
+	${NS}::labelframe $w.options -text [mc Options]
 
-	checkbutton $w.options.fetch \
+	${NS}::checkbutton $w.options.fetch \
 		-text [mc "Fetch Tracking Branch"] \
 		-variable @opt_fetch
 	pack $w.options.fetch -anchor nw
 
-	checkbutton $w.options.detach \
+	${NS}::checkbutton $w.options.detach \
 		-text [mc "Detach From Local Branch"] \
 		-variable @opt_detach
 	pack $w.options.detach -anchor nw
@@ -50,6 +53,7 @@ constructor dialog {} {
 	bind $w <Visibility> [cb _visible]
 	bind $w <Key-Escape> [list destroy $w]
 	bind $w <Key-Return> [cb _checkout]\;break
+	wm deiconify $w
 	tkwait window $w
 }
 
diff --git a/lib/branch_create.tcl b/lib/branch_create.tcl
index 3817771b94..4bb907705c 100644
--- a/lib/branch_create.tcl
+++ b/lib/branch_create.tcl
@@ -16,48 +16,48 @@ field opt_fetch     1; # refetch tracking branch if used?
 field reset_ok      0; # did the user agree to reset?
 
 constructor dialog {} {
-	global repo_config
+	global repo_config use_ttk NS
 
-	make_toplevel top w
+	make_dialog top w
+	wm withdraw $w
 	wm title $top [append "[appname] ([reponame]): " [mc "Create Branch"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 	}
 
-	label $w.header -text [mc "Create New Branch"] -font font_uibold
+	${NS}::label $w.header -text [mc "Create New Branch"] \
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.create -text [mc Create] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.create -text [mc Create] \
 		-default active \
 		-command [cb _create]
 	pack $w.buttons.create -side right
-	button $w.buttons.cancel -text [mc Cancel] \
+	${NS}::button $w.buttons.cancel -text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	labelframe $w.desc -text [mc "Branch Name"]
-	radiobutton $w.desc.name_r \
-		-anchor w \
+	${NS}::labelframe $w.desc -text [mc "Branch Name"]
+	${NS}::radiobutton $w.desc.name_r \
 		-text [mc "Name:"] \
 		-value user \
 		-variable @name_type
+	if {!$use_ttk} {$w.desc.name_r configure -anchor w}
 	set w_name $w.desc.name_t
-	entry $w_name \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::entry $w_name \
 		-width 40 \
 		-textvariable @name \
 		-validate key \
 		-validatecommand [cb _validate %d %S]
 	grid $w.desc.name_r $w_name -sticky we -padx {0 5}
 
-	radiobutton $w.desc.match_r \
-		-anchor w \
+	${NS}::radiobutton $w.desc.match_r \
 		-text [mc "Match Tracking Branch Name"] \
 		-value match \
 		-variable @name_type
+	if {!$use_ttk} {$w.desc.match_r configure -anchor w}
 	grid $w.desc.match_r -sticky we -padx {0 5} -columnspan 2
 
 	grid columnconfigure $w.desc 1 -weight 1
@@ -66,34 +66,34 @@ constructor dialog {} {
 	set w_rev [::choose_rev::new $w.rev [mc "Starting Revision"]]
 	pack $w.rev -anchor nw -fill both -expand 1 -pady 5 -padx 5
 
-	labelframe $w.options -text [mc Options]
+	${NS}::labelframe $w.options -text [mc Options]
 
-	frame $w.options.merge
-	label $w.options.merge.l -text [mc "Update Existing Branch:"]
+	${NS}::frame $w.options.merge
+	${NS}::label $w.options.merge.l -text [mc "Update Existing Branch:"]
 	pack $w.options.merge.l -side left
-	radiobutton $w.options.merge.no \
+	${NS}::radiobutton $w.options.merge.no \
 		-text [mc No] \
 		-value none \
 		-variable @opt_merge
 	pack $w.options.merge.no -side left
-	radiobutton $w.options.merge.ff \
+	${NS}::radiobutton $w.options.merge.ff \
 		-text [mc "Fast Forward Only"] \
 		-value ff \
 		-variable @opt_merge
 	pack $w.options.merge.ff -side left
-	radiobutton $w.options.merge.reset \
+	${NS}::radiobutton $w.options.merge.reset \
 		-text [mc Reset] \
 		-value reset \
 		-variable @opt_merge
 	pack $w.options.merge.reset -side left
 	pack $w.options.merge -anchor nw
 
-	checkbutton $w.options.fetch \
+	${NS}::checkbutton $w.options.fetch \
 		-text [mc "Fetch Tracking Branch"] \
 		-variable @opt_fetch
 	pack $w.options.fetch -anchor nw
 
-	checkbutton $w.options.checkout \
+	${NS}::checkbutton $w.options.checkout \
 		-text [mc "Checkout After Creation"] \
 		-variable @opt_checkout
 	pack $w.options.checkout -anchor nw
@@ -109,6 +109,7 @@ constructor dialog {} {
 	bind $w <Visibility> [cb _visible]
 	bind $w <Key-Escape> [list destroy $w]
 	bind $w <Key-Return> [cb _create]\;break
+	wm deiconify $w
 	tkwait window $w
 }
 
diff --git a/lib/branch_delete.tcl b/lib/branch_delete.tcl
index 20d5e42307..867938ec6a 100644
--- a/lib/branch_delete.tcl
+++ b/lib/branch_delete.tcl
@@ -9,41 +9,40 @@ field w_check         ; # revision picker for merge test
 field w_delete        ; # delete button
 
 constructor dialog {} {
-	global current_branch
+	global current_branch use_ttk NS
 
-	make_toplevel top w
+	make_dialog top w
+	wm withdraw $w
 	wm title $top [append "[appname] ([reponame]): " [mc "Delete Branch"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 	}
 
-	label $w.header -text [mc "Delete Local Branch"] -font font_uibold
+	${NS}::label $w.header -text [mc "Delete Local Branch"] \
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
+	${NS}::frame $w.buttons
 	set w_delete $w.buttons.delete
-	button $w_delete \
+	${NS}::button $w_delete \
 		-text [mc Delete] \
 		-default active \
 		-state disabled \
 		-command [cb _delete]
 	pack $w_delete -side right
-	button $w.buttons.cancel \
+	${NS}::button $w.buttons.cancel \
 		-text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	labelframe $w.list -text [mc "Local Branches"]
+	${NS}::labelframe $w.list -text [mc "Local Branches"]
 	set w_heads $w.list.l
-	listbox $w_heads \
+	slistbox $w_heads \
 		-height 10 \
 		-width 70 \
 		-selectmode extended \
-		-exportselection false \
-		-yscrollcommand [list $w.list.sby set]
-	scrollbar $w.list.sby -command [list $w.list.l yview]
-	pack $w.list.sby -side right -fill y
+		-exportselection false
 	pack $w.list.l -side left -fill both -expand 1
 	pack $w.list -fill both -expand 1 -pady 5 -padx 5
 
@@ -67,6 +66,7 @@ constructor dialog {} {
 	"
 	bind $w <Key-Escape> [list destroy $w]
 	bind $w <Key-Return> [cb _delete]\;break
+	wm deiconify $w
 	tkwait window $w
 }
 
diff --git a/lib/branch_rename.tcl b/lib/branch_rename.tcl
index 166538808f..63988773ba 100644
--- a/lib/branch_rename.tcl
+++ b/lib/branch_rename.tcl
@@ -8,9 +8,10 @@ field oldname
 field newname
 
 constructor dialog {} {
-	global current_branch
+	global current_branch use_ttk NS
 
-	make_toplevel top w
+	make_dialog top w
+	wm withdraw $w
 	wm title $top [append "[appname] ([reponame]): " [mc "Rename Branch"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
@@ -19,27 +20,31 @@ constructor dialog {} {
 	set oldname $current_branch
 	set newname [get_config gui.newbranchtemplate]
 
-	label $w.header -text [mc "Rename Branch"] -font font_uibold
+	${NS}::label $w.header -text [mc "Rename Branch"]\
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.rename -text [mc Rename] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.rename -text [mc Rename] \
 		-default active \
 		-command [cb _rename]
 	pack $w.buttons.rename -side right
-	button $w.buttons.cancel -text [mc Cancel] \
+	${NS}::button $w.buttons.cancel -text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	frame $w.rename
-	label $w.rename.oldname_l -text [mc "Branch:"]
-	eval tk_optionMenu $w.rename.oldname_m @oldname [load_all_heads]
+	${NS}::frame $w.rename
+	${NS}::label $w.rename.oldname_l -text [mc "Branch:"]
+	if {$use_ttk} {
+		ttk::combobox $w.rename.oldname_m -textvariable @oldname \
+			-values [load_all_heads] -state readonly
+	} else {
+		eval tk_optionMenu $w.rename.oldname_m @oldname [load_all_heads]
+	}
 
-	label $w.rename.newname_l -text [mc "New Name:"]
-	entry $w.rename.newname_t \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::label $w.rename.newname_l -text [mc "New Name:"]
+	${NS}::entry $w.rename.newname_t \
 		-width 40 \
 		-textvariable @newname \
 		-validate key \
@@ -60,6 +65,7 @@ constructor dialog {} {
 		$w.rename.newname_t icursor end
 		focus $w.rename.newname_t
 	"
+	wm deiconify $w
 	tkwait window $w
 }
 
diff --git a/lib/browser.tcl b/lib/browser.tcl
index 0410cc68df..c2415729e0 100644
--- a/lib/browser.tcl
+++ b/lib/browser.tcl
@@ -21,23 +21,23 @@ field browser_busy   1
 field ls_buf     {}; # Buffered record output from ls-tree
 
 constructor new {commit {path {}}} {
-	global cursor_ptr M1B
-	make_toplevel top w
+	global cursor_ptr M1B use_ttk NS
+	make_dialog top w
+	wm withdraw $top
 	wm title $top [append "[appname] ([reponame]): " [mc "File Browser"]]
 
 	set browser_commit $commit
 	set browser_path $browser_commit:$path
 
-	label $w.path \
+	${NS}::label $w.path \
 		-textvariable @browser_path \
 		-anchor w \
 		-justify left \
-		-borderwidth 1 \
-		-relief sunken \
 		-font font_uibold
+	if {!$use_ttk} { $w.path configure -borderwidth 1 -relief sunken}
 	pack $w.path -anchor w -side top -fill x
 
-	frame $w.list
+	${NS}::frame $w.list
 	set w_list $w.list.l
 	text $w_list -background white -foreground black \
 		-borderwidth 0 \
@@ -49,19 +49,18 @@ constructor new {commit {path {}}} {
 		-xscrollcommand [list $w.list.sbx set] \
 		-yscrollcommand [list $w.list.sby set]
 	rmsel_tag $w_list
-	scrollbar $w.list.sbx -orient h -command [list $w_list xview]
-	scrollbar $w.list.sby -orient v -command [list $w_list yview]
+	${NS}::scrollbar $w.list.sbx -orient h -command [list $w_list xview]
+	${NS}::scrollbar $w.list.sby -orient v -command [list $w_list yview]
 	pack $w.list.sbx -side bottom -fill x
 	pack $w.list.sby -side right -fill y
 	pack $w_list -side left -fill both -expand 1
 	pack $w.list -side top -fill both -expand 1
 
-	label $w.status \
+	${NS}::label $w.status \
 		-textvariable @browser_status \
 		-anchor w \
-		-justify left \
-		-borderwidth 1 \
-		-relief sunken
+		-justify left
+	if {!$use_ttk} { $w.status configure -borderwidth 1 -relief sunken}
 	pack $w.status -anchor w -side bottom -fill x
 
 	bind $w_list <Button-1>        "[cb _click 0 @%x,%y];break"
@@ -78,6 +77,7 @@ constructor new {commit {path {}}} {
 	bind $w_list <Right>           break
 
 	bind $w_list <Visibility> [list focus $w_list]
+	wm deiconify $top
 	set w $w_list
 	if {$path ne {}} {
 		_ls $this $browser_commit:$path $path
@@ -263,23 +263,27 @@ field w              ; # widget path
 field w_rev          ; # mega-widget to pick the initial revision
 
 constructor dialog {} {
-	make_toplevel top w
+	global use_ttk NS
+	make_dialog top w
+	wm withdraw $top
 	wm title $top [append "[appname] ([reponame]): " [mc "Browse Branch Files"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
+		wm transient $top .
 	}
 
-	label $w.header \
+	${NS}::label $w.header \
 		-text [mc "Browse Branch Files"] \
-		-font font_uibold
+		-font font_uibold \
+		-anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.browse -text [mc Browse] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.browse -text [mc Browse] \
 		-default active \
 		-command [cb _open]
 	pack $w.buttons.browse -side right
-	button $w.buttons.cancel -text [mc Cancel] \
+	${NS}::button $w.buttons.cancel -text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
@@ -291,6 +295,7 @@ constructor dialog {} {
 	bind $w <Visibility> [cb _visible]
 	bind $w <Key-Escape> [list destroy $w]
 	bind $w <Key-Return> [cb _open]\;break
+	wm deiconify $top
 	tkwait window $w
 }
 
diff --git a/lib/choose_font.tcl b/lib/choose_font.tcl
index 56443b042c..ebe50bd7d0 100644
--- a/lib/choose_font.tcl
+++ b/lib/choose_font.tcl
@@ -17,6 +17,7 @@ variable all_families [list]  ; # All fonts known to Tk
 
 constructor pick {path title a_family a_size} {
 	variable all_families
+	global use_ttk NS
 
 	set v_family $a_family
 	set v_size $a_size
@@ -27,29 +28,30 @@ constructor pick {path title a_family a_size} {
 	set f_family $pv_family
 	set f_size $pv_size
 
-	make_toplevel top w
+	make_dialog top w
+	wm withdraw $top
 	wm title $top "[appname] ([reponame]): $title"
 	wm geometry $top "+[winfo rootx $path]+[winfo rooty $path]"
 
-	label $w.header -text $title -font font_uibold
+	${NS}::label $w.header -text $title -font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.select \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.select \
 		-text [mc Select] \
 		-default active \
 		-command [cb _select]
-	button $w.buttons.cancel \
+	${NS}::button $w.buttons.cancel \
 		-text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.select -side right
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	frame $w.inner
+	${NS}::frame $w.inner
 
-	frame $w.inner.family
-	label $w.inner.family.l \
+	${NS}::frame $w.inner.family
+	${NS}::label $w.inner.family.l \
 		-text [mc "Font Family"] \
 		-anchor w
 	set w_family $w.inner.family.v
@@ -64,16 +66,16 @@ constructor pick {path title a_family a_size} {
 		-height 10 \
 		-yscrollcommand [list $w.inner.family.sby set]
 	rmsel_tag $w_family
-	scrollbar $w.inner.family.sby -command [list $w_family yview]
+	${NS}::scrollbar $w.inner.family.sby -command [list $w_family yview]
 	pack $w.inner.family.l -side top -fill x
 	pack $w.inner.family.sby -side right -fill y
 	pack $w_family -fill both -expand 1
 
-	frame $w.inner.size
-	label $w.inner.size.l \
+	${NS}::frame $w.inner.size
+	${NS}::label $w.inner.size.l \
 		-text [mc "Font Size"] \
 		-anchor w
-	spinbox $w.inner.size.v \
+	tspinbox $w.inner.size.v \
 		-textvariable @f_size \
 		-from 2 -to 80 -increment 1 \
 		-width 3
@@ -86,8 +88,8 @@ constructor pick {path title a_family a_size} {
 	grid columnconfigure $w.inner 0 -weight 1
 	pack $w.inner -fill both -expand 1 -padx 5 -pady 5
 
-	frame $w.example
-	label $w.example.l \
+	${NS}::frame $w.example
+	${NS}::label $w.example.l \
 		-text [mc "Font Example"] \
 		-anchor w
 	set w_example $w.example.t
@@ -129,6 +131,7 @@ constructor pick {path title a_family a_size} {
 		grab $w
 		focus $w
 	"
+	wm deiconify $w
 	tkwait window $w
 }
 
diff --git a/lib/choose_repository.tcl b/lib/choose_repository.tcl
index 3f8f3030fa..64f06748b6 100644
--- a/lib/choose_repository.tcl
+++ b/lib/choose_repository.tcl
@@ -22,9 +22,9 @@ field readtree_err        ; # Error output from read-tree (if any)
 field sorted_recent       ; # recent repositories (sorted)
 
 constructor pick {} {
-	global M1T M1B
+	global M1T M1B use_ttk NS
 
-	make_toplevel top w
+	make_dialog top w
 	wm title $top [mc "Git Gui"]
 
 	if {$top eq {.}} {
@@ -71,11 +71,11 @@ constructor pick {} {
 
 	set w_body $w.body
 	set opts $w_body.options
-	frame $w_body
+	${NS}::frame $w_body
 	text $opts \
 		-cursor $::cursor_ptr \
 		-relief flat \
-		-background [$w_body cget -background] \
+		-background [get_bg_color $w_body] \
 		-wrap none \
 		-spacing1 5 \
 		-width 50 \
@@ -132,15 +132,15 @@ constructor pick {} {
 				-label [mc "Recent Repositories"]
 		}
 
-		label $w_body.space
-		label $w_body.recentlabel \
+		${NS}::label $w_body.space
+		${NS}::label $w_body.recentlabel \
 			-anchor w \
 			-text [mc "Open Recent Repository:"]
 		set w_recentlist $w_body.recentlist
 		text $w_recentlist \
 			-cursor $::cursor_ptr \
 			-relief flat \
-			-background [$w_body.recentlabel cget -background] \
+			-background [get_bg_color $w_body.recentlabel] \
 			-wrap none \
 			-width 50 \
 			-height 10
@@ -176,10 +176,10 @@ constructor pick {} {
 	}
 	pack $w_body -fill x -padx 10 -pady 10
 
-	frame $w.buttons
+	${NS}::frame $w.buttons
 	set w_next $w.buttons.next
 	set w_quit $w.buttons.quit
-	button $w_quit \
+	${NS}::button $w_quit \
 		-text [mc "Quit"] \
 		-command exit
 	pack $w_quit -side right -padx 5
@@ -203,6 +203,7 @@ constructor pick {} {
 	wm deiconify $top
 	tkwait variable @done
 
+	grab release $top
 	if {$top eq {.}} {
 		eval destroy [winfo children $top]
 	}
@@ -284,9 +285,10 @@ method _open_recent_path {p} {
 }
 
 method _next {action} {
+	global NS
 	destroy $w_body
 	if {![winfo exists $w_next]} {
-		button $w_next -default active
+		${NS}::button $w_next -default active
 		pack $w_next -side right -padx 5 -before $w_quit
 	}
 	_do_$action $this
@@ -375,26 +377,25 @@ proc _objdir {path} {
 ## Create New Repository
 
 method _do_new {} {
+	global use_ttk NS
 	$w_next conf \
 		-state disabled \
 		-command [cb _do_new2] \
 		-text [mc "Create"]
 
-	frame $w_body
-	label $w_body.h \
-		-font font_uibold \
+	${NS}::frame $w_body
+	${NS}::label $w_body.h \
+		-font font_uibold -anchor center \
 		-text [mc "Create New Repository"]
 	pack $w_body.h -side top -fill x -pady 10
 	pack $w_body -fill x -padx 10
 
-	frame $w_body.where
-	label $w_body.where.l -text [mc "Directory:"]
-	entry $w_body.where.t \
+	${NS}::frame $w_body.where
+	${NS}::label $w_body.where.l -text [mc "Directory:"]
+	${NS}::entry $w_body.where.t \
 		-textvariable @local_path \
-		-borderwidth 1 \
-		-relief sunken \
 		-width 50
-	button $w_body.where.b \
+	${NS}::button $w_body.where.b \
 		-text [mc "Browse"] \
 		-command [cb _new_local_path]
 	set w_localpath $w_body.where.t
@@ -460,63 +461,57 @@ proc _new_ok {p} {
 ## Clone Existing Repository
 
 method _do_clone {} {
+	global use_ttk NS
 	$w_next conf \
 		-state disabled \
 		-command [cb _do_clone2] \
 		-text [mc "Clone"]
 
-	frame $w_body
-	label $w_body.h \
-		-font font_uibold \
+	${NS}::frame $w_body
+	${NS}::label $w_body.h \
+		-font font_uibold -anchor center \
 		-text [mc "Clone Existing Repository"]
 	pack $w_body.h -side top -fill x -pady 10
 	pack $w_body -fill x -padx 10
 
 	set args $w_body.args
-	frame $w_body.args
+	${NS}::frame $w_body.args
 	pack $args -fill both
 
-	label $args.origin_l -text [mc "Source Location:"]
-	entry $args.origin_t \
+	${NS}::label $args.origin_l -text [mc "Source Location:"]
+	${NS}::entry $args.origin_t \
 		-textvariable @origin_url \
-		-borderwidth 1 \
-		-relief sunken \
 		-width 50
-	button $args.origin_b \
+	${NS}::button $args.origin_b \
 		-text [mc "Browse"] \
 		-command [cb _open_origin]
 	grid $args.origin_l $args.origin_t $args.origin_b -sticky ew
 
-	label $args.where_l -text [mc "Target Directory:"]
-	entry $args.where_t \
+	${NS}::label $args.where_l -text [mc "Target Directory:"]
+	${NS}::entry $args.where_t \
 		-textvariable @local_path \
-		-borderwidth 1 \
-		-relief sunken \
 		-width 50
-	button $args.where_b \
+	${NS}::button $args.where_b \
 		-text [mc "Browse"] \
 		-command [cb _new_local_path]
 	grid $args.where_l $args.where_t $args.where_b -sticky ew
 	set w_localpath $args.where_t
 
-	label $args.type_l -text [mc "Clone Type:"]
-	frame $args.type_f
+	${NS}::label $args.type_l -text [mc "Clone Type:"]
+	${NS}::frame $args.type_f
 	set w_types [list]
-	lappend w_types [radiobutton $args.type_f.hardlink \
+	lappend w_types [${NS}::radiobutton $args.type_f.hardlink \
 		-state disabled \
-		-anchor w \
 		-text [mc "Standard (Fast, Semi-Redundant, Hardlinks)"] \
 		-variable @clone_type \
 		-value hardlink]
-	lappend w_types [radiobutton $args.type_f.full \
+	lappend w_types [${NS}::radiobutton $args.type_f.full \
 		-state disabled \
-		-anchor w \
 		-text [mc "Full Copy (Slower, Redundant Backup)"] \
 		-variable @clone_type \
 		-value full]
-	lappend w_types [radiobutton $args.type_f.shared \
+	lappend w_types [${NS}::radiobutton $args.type_f.shared \
 		-state disabled \
-		-anchor w \
 		-text [mc "Shared (Fastest, Not Recommended, No Backup)"] \
 		-variable @clone_type \
 		-value shared]
@@ -1005,26 +1000,25 @@ method _postcheckout_wait {fd_ph} {
 ## Open Existing Repository
 
 method _do_open {} {
+	global NS
 	$w_next conf \
 		-state disabled \
 		-command [cb _do_open2] \
 		-text [mc "Open"]
 
-	frame $w_body
-	label $w_body.h \
-		-font font_uibold \
+	${NS}::frame $w_body
+	${NS}::label $w_body.h \
+		-font font_uibold -anchor center \
 		-text [mc "Open Existing Repository"]
 	pack $w_body.h -side top -fill x -pady 10
 	pack $w_body -fill x -padx 10
 
-	frame $w_body.where
-	label $w_body.where.l -text [mc "Repository:"]
-	entry $w_body.where.t \
+	${NS}::frame $w_body.where
+	${NS}::label $w_body.where.l -text [mc "Repository:"]
+	${NS}::entry $w_body.where.t \
 		-textvariable @local_path \
-		-borderwidth 1 \
-		-relief sunken \
 		-width 50
-	button $w_body.where.b \
+	${NS}::button $w_body.where.b \
 		-text [mc "Browse"] \
 		-command [cb _open_local_path]
 
diff --git a/lib/choose_rev.tcl b/lib/choose_rev.tcl
index c8821c1463..c12d5e1698 100644
--- a/lib/choose_rev.tcl
+++ b/lib/choose_rev.tcl
@@ -10,7 +10,7 @@ field w_list          ; # list of currently filtered specs
 field w_filter        ; # filter entry for $w_list
 
 field c_expr        {}; # current revision expression
-field filter          ; # current filter string
+field filter        ""; # current filter string
 field revtype     head; # type of revision chosen
 field cur_specs [list]; # list of specs for $revtype
 field spec_head       ; # list of all head specs
@@ -32,7 +32,7 @@ proc new_unmerged {path {title {}}} {
 }
 
 constructor _new {path unmerged_only title} {
-	global current_branch is_detached
+	global current_branch is_detached use_ttk NS
 
 	if {![info exists ::all_remotes]} {
 		load_all_remotes
@@ -41,65 +41,65 @@ constructor _new {path unmerged_only title} {
 	set w $path
 
 	if {$title ne {}} {
-		labelframe $w -text $title
+		${NS}::labelframe $w -text $title
 	} else {
-		frame $w
+		${NS}::frame $w
 	}
 	bind $w <Destroy> [cb _delete %W]
 
 	if {$is_detached} {
-		radiobutton $w.detachedhead_r \
-			-anchor w \
+		${NS}::radiobutton $w.detachedhead_r \
 			-text [mc "This Detached Checkout"] \
 			-value HEAD \
 			-variable @revtype
+		if {!$use_ttk} {$w.detachedhead_r configure -anchor w}
 		grid $w.detachedhead_r -sticky we -padx {0 5} -columnspan 2
 	}
 
-	radiobutton $w.expr_r \
+	${NS}::radiobutton $w.expr_r \
 		-text [mc "Revision Expression:"] \
 		-value expr \
 		-variable @revtype
-	entry $w.expr_t \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::entry $w.expr_t \
 		-width 50 \
 		-textvariable @c_expr \
 		-validate key \
 		-validatecommand [cb _validate %d %S]
 	grid $w.expr_r $w.expr_t -sticky we -padx {0 5}
 
-	frame $w.types
-	radiobutton $w.types.head_r \
+	${NS}::frame $w.types
+	${NS}::radiobutton $w.types.head_r \
 		-text [mc "Local Branch"] \
 		-value head \
 		-variable @revtype
 	pack $w.types.head_r -side left
-	radiobutton $w.types.trck_r \
+	${NS}::radiobutton $w.types.trck_r \
 		-text [mc "Tracking Branch"] \
 		-value trck \
 		-variable @revtype
 	pack $w.types.trck_r -side left
-	radiobutton $w.types.tag_r \
+	${NS}::radiobutton $w.types.tag_r \
 		-text [mc "Tag"] \
 		-value tag \
 		-variable @revtype
 	pack $w.types.tag_r -side left
 	set w_filter $w.types.filter
-	entry $w_filter \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::entry $w_filter \
 		-width 12 \
 		-textvariable @filter \
 		-validate key \
 		-validatecommand [cb _filter %P]
 	pack $w_filter -side right
-	pack [label $w.types.filter_icon \
+	pack [${NS}::label $w.types.filter_icon \
 		-image ::choose_rev::img_find \
 		] -side right
 	grid $w.types -sticky we -padx {0 5} -columnspan 2
 
-	frame $w.list
+	if {$use_ttk} {
+		ttk::frame $w.list -style SListbox.TFrame -padding 2
+	} else {
+		frame $w.list
+	}
 	set w_list $w.list.l
 	listbox $w_list \
 		-font font_diff \
@@ -109,6 +109,9 @@ constructor _new {path unmerged_only title} {
 		-exportselection false \
 		-xscrollcommand [cb _sb_set $w.list.sbx h] \
 		-yscrollcommand [cb _sb_set $w.list.sby v]
+	if {$use_ttk} {
+		$w_list configure -relief flat -highlightthickness 0 -borderwidth 0
+	}
 	pack $w_list -fill both -expand 1
 	grid $w.list -sticky nswe -padx {20 5} -columnspan 2
 	bind $w_list <Any-Motion>  [cb _show_tooltip @%x,%y]
@@ -235,11 +238,12 @@ constructor _new {path unmerged_only title} {
 }
 
 method none {text} {
+	global NS use_ttk
 	if {![winfo exists $w.none_r]} {
-		radiobutton $w.none_r \
-			-anchor w \
+		${NS}::radiobutton $w.none_r \
 			-value none \
 			-variable @revtype
+		if {!$use_ttk} {$w.none_r configure -anchor w}
 		grid $w.none_r -sticky we -padx {0 5} -columnspan 2
 	}
 	$w.none_r configure -text $text
@@ -425,6 +429,7 @@ method _delete {current} {
 }
 
 method _sb_set {sb orient first last} {
+	global NS
 	set old_focus [focus -lastfor $w]
 
 	if {$first == 0 && $last == 1} {
@@ -440,10 +445,10 @@ method _sb_set {sb orient first last} {
 
 	if {![winfo exists $sb]} {
 		if {$orient eq {h}} {
-			scrollbar $sb -orient h -command [list $w_list xview]
+			${NS}::scrollbar $sb -orient h -command [list $w_list xview]
 			pack $sb -fill x -side bottom -before $w_list
 		} else {
-			scrollbar $sb -orient v -command [list $w_list yview]
+			${NS}::scrollbar $sb -orient v -command [list $w_list yview]
 			pack $sb -fill y -side right -before $w_list
 		}
 		if {$old_focus ne {}} {
diff --git a/lib/class.tcl b/lib/class.tcl
index dc2141192a..c27b71476a 100644
--- a/lib/class.tcl
+++ b/lib/class.tcl
@@ -134,6 +134,13 @@ proc delete_this {{t {}}} {
 	if {[namespace exists $t]} {namespace delete $t}
 }
 
+proc make_dialog {t w args} {
+	upvar $t top $w pfx this this
+	global use_ttk
+	uplevel [linsert $args 0 make_toplevel $t $w]
+	pave_toplevel $pfx
+}
+
 proc make_toplevel {t w args} {
 	upvar $t top $w pfx this this
 
diff --git a/lib/console.tcl b/lib/console.tcl
index c112464ec3..1f3248ffd1 100644
--- a/lib/console.tcl
+++ b/lib/console.tcl
@@ -27,20 +27,20 @@ constructor embed {path title} {
 }
 
 method _init {} {
-	global M1B
+	global M1B use_ttk NS
 
 	if {$is_toplevel} {
-		make_toplevel top w -autodelete 0
+		make_dialog top w -autodelete 0
 		wm title $top "[appname] ([reponame]): $t_short"
 	} else {
-		frame $w
+		${NS}::frame $w
 	}
 
 	set console_cr 1.0
 	set w_t $w.m.t
 
-	frame $w.m
-	label $w.m.l1 \
+	${NS}::frame $w.m
+	${NS}::label $w.m.l1 \
 		-textvariable @t_long  \
 		-anchor w \
 		-justify left \
@@ -78,7 +78,7 @@ method _init {} {
 		"
 
 	if {$is_toplevel} {
-		button $w.ok -text [mc "Close"] \
+		${NS}::button $w.ok -text [mc "Close"] \
 			-state disabled \
 			-command [list destroy $w]
 		pack $w.ok -side bottom -anchor e -pady 10 -padx 10
@@ -206,13 +206,14 @@ method done {ok} {
 }
 
 method _sb_set {sb orient first last} {
+	global NS
 	if {![winfo exists $sb]} {
 		if {$first == $last || ($first == 0 && $last == 1)} return
 		if {$orient eq {h}} {
-			scrollbar $sb -orient h -command [list $w_t xview]
+			${NS}::scrollbar $sb -orient h -command [list $w_t xview]
 			pack $sb -fill x -side bottom -before $w_t
 		} else {
-			scrollbar $sb -orient v -command [list $w_t yview]
+			${NS}::scrollbar $sb -orient v -command [list $w_t yview]
 			pack $sb -fill y -side right -before $w_t
 		}
 	}
diff --git a/lib/database.tcl b/lib/database.tcl
index d4e0bed0b6..1f187ed286 100644
--- a/lib/database.tcl
+++ b/lib/database.tcl
@@ -2,6 +2,7 @@
 # Copyright (C) 2006, 2007 Shawn Pearce
 
 proc do_stats {} {
+	global use_ttk NS
 	set fd [git_read count-objects -v]
 	while {[gets $fd line] > 0} {
 		if {[regexp {^([^:]+): (\d+)$} $line _ name value]} {
@@ -21,24 +22,22 @@ proc do_stats {} {
 	}
 
 	set w .stats_view
-	toplevel $w
+	Dialog $w
+	wm withdraw $w
 	wm geometry $w "+[winfo rootx .]+[winfo rooty .]"
 
-	label $w.header -text [mc "Database Statistics"]
-	pack $w.header -side top -fill x
-
-	frame $w.buttons -border 1
-	button $w.buttons.close -text [mc Close] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.close -text [mc Close] \
 		-default active \
 		-command [list destroy $w]
-	button $w.buttons.gc -text [mc "Compress Database"] \
+	${NS}::button $w.buttons.gc -text [mc "Compress Database"] \
 		-default normal \
 		-command "destroy $w;do_gc"
 	pack $w.buttons.close -side right
 	pack $w.buttons.gc -side left
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	frame $w.stat -borderwidth 1 -relief solid
+	${NS}::labelframe $w.stat -text [mc "Database Statistics"]
 	foreach s {
 		{count           {mc "Number of loose objects"}}
 		{size            {mc "Disk space used by loose objects"} { KiB}}
@@ -55,8 +54,8 @@ proc do_stats {} {
 			set value "$value[lindex $s 2]"
 		}
 
-		label $w.stat.l_$name -text "$label:" -anchor w
-		label $w.stat.v_$name -text $value -anchor w
+		${NS}::label $w.stat.l_$name -text "$label:" -anchor w
+		${NS}::label $w.stat.v_$name -text $value -anchor w
 		grid $w.stat.l_$name $w.stat.v_$name -sticky we -padx {0 5}
 	}
 	pack $w.stat -pady 10 -padx 10
@@ -65,6 +64,7 @@ proc do_stats {} {
 	bind $w <Key-Escape> [list destroy $w]
 	bind $w <Key-Return> [list destroy $w]
 	wm title $w [append "[appname] ([reponame]): " [mc "Database Statistics"]]
+	wm deiconify $w
 	tkwait window $w
 }
 
diff --git a/lib/error.tcl b/lib/error.tcl
index 75650157e5..c0fa69af56 100644
--- a/lib/error.tcl
+++ b/lib/error.tcl
@@ -71,11 +71,13 @@ proc ask_popup {msg} {
 }
 
 proc hook_failed_popup {hook msg {is_fatal 1}} {
+	global use_ttk NS
 	set w .hookfail
-	toplevel $w
+	Dialog $w
+	wm withdraw $w
 
-	frame $w.m
-	label $w.m.l1 -text "$hook hook failed:" \
+	${NS}::frame $w.m
+	${NS}::label $w.m.l1 -text "$hook hook failed:" \
 		-anchor w \
 		-justify left \
 		-font font_uibold
@@ -87,10 +89,10 @@ proc hook_failed_popup {hook msg {is_fatal 1}} {
 		-width 80 -height 10 \
 		-font font_diff \
 		-yscrollcommand [list $w.m.sby set]
-	scrollbar $w.m.sby -command [list $w.m.t yview]
+	${NS}::scrollbar $w.m.sby -command [list $w.m.t yview]
 	pack $w.m.l1 -side top -fill x
 	if {$is_fatal} {
-		label $w.m.l2 \
+		${NS}::label $w.m.l2 \
 			-text [mc "You must correct the above errors before committing."] \
 			-anchor w \
 			-justify left \
@@ -104,7 +106,7 @@ proc hook_failed_popup {hook msg {is_fatal 1}} {
 	$w.m.t insert 1.0 $msg
 	$w.m.t conf -state disabled
 
-	button $w.ok -text OK \
+	${NS}::button $w.ok -text OK \
 		-width 15 \
 		-command "destroy $w"
 	pack $w.ok -side bottom -anchor e -pady 10 -padx 10
@@ -112,5 +114,6 @@ proc hook_failed_popup {hook msg {is_fatal 1}} {
 	bind $w <Visibility> "grab $w; focus $w"
 	bind $w <Key-Return> "destroy $w"
 	wm title $w [strcat "[appname] ([reponame]): " [mc "error"]]
+	wm deiconify $w
 	tkwait window $w
 }
diff --git a/lib/index.tcl b/lib/index.tcl
index 0b58bd8876..e9db0c4989 100644
--- a/lib/index.tcl
+++ b/lib/index.tcl
@@ -8,26 +8,28 @@ proc _delete_indexlock {} {
 }
 
 proc _close_updateindex {fd after} {
+	global use_ttk NS
 	fconfigure $fd -blocking 1
 	if {[catch {close $fd} err]} {
 		set w .indexfried
-		toplevel $w
+		Dialog $w
+		wm withdraw $w
 		wm title $w [strcat "[appname] ([reponame]): " [mc "Index Error"]]
 		wm geometry $w "+[winfo rootx .]+[winfo rooty .]"
 		set s [mc "Updating the Git index failed.  A rescan will be automatically started to resynchronize git-gui."]
 		text $w.msg -yscrollcommand [list $w.vs set] \
 			-width [string length $s] -relief flat \
 			-borderwidth 0 -highlightthickness 0 \
-			-background [$w cget -background]
+			-background [get_bg_color $w]
 		$w.msg tag configure bold -font font_uibold -justify center
-		scrollbar $w.vs -command [list $w.msg yview]
+		${NS}::scrollbar $w.vs -command [list $w.msg yview]
 		$w.msg insert end $s bold \n\n$err {}
 		$w.msg configure -state disabled
 
-		button $w.continue \
+		${NS}::button $w.continue \
 			-text [mc "Continue"] \
 			-command [list destroy $w]
-		button $w.unlock \
+		${NS}::button $w.unlock \
 			-text [mc "Unlock Index"] \
 			-command "destroy $w; _delete_indexlock"
 		grid $w.msg - $w.vs -sticky news
@@ -40,6 +42,7 @@ proc _close_updateindex {fd after} {
 			grab $w
 			focus %W
 		"
+		wm deiconify $w
 		tkwait window $w
 
 		$::main_status stop
diff --git a/lib/merge.tcl b/lib/merge.tcl
index 283e4915e9..5cded2341c 100644
--- a/lib/merge.tcl
+++ b/lib/merge.tcl
@@ -139,14 +139,14 @@ method _finish {cons ok} {
 
 constructor dialog {} {
 	global current_branch
-	global M1B
+	global M1B use_ttk NS
 
 	if {![_can_merge $this]} {
 		delete_this
 		return
 	}
 
-	make_toplevel top w
+	make_dialog top w
 	wm title $top [append "[appname] ([reponame]): " [mc "Merge"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
@@ -154,21 +154,21 @@ constructor dialog {} {
 
 	set _start [cb _start]
 
-	label $w.header \
+	${NS}::label $w.header \
 		-text [mc "Merge Into %s" $current_branch] \
 		-font font_uibold
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.visualize \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.visualize \
 		-text [mc Visualize] \
 		-command [cb _visualize]
 	pack $w.buttons.visualize -side left
-	button $w.buttons.merge \
+	${NS}::button $w.buttons.merge \
 		-text [mc Merge] \
 		-command $_start
 	pack $w.buttons.merge -side right
-	button $w.buttons.cancel \
+	${NS}::button $w.buttons.cancel \
 		-text [mc "Cancel"] \
 		-command [cb _cancel]
 	pack $w.buttons.cancel -side right -padx 5
diff --git a/lib/option.tcl b/lib/option.tcl
index 1d55b49c9b..d4c5e45c8a 100644
--- a/lib/option.tcl
+++ b/lib/option.tcl
@@ -91,7 +91,7 @@ proc save_config {} {
 proc do_options {} {
 	global repo_config global_config font_descs
 	global repo_config_new global_config_new
-	global ui_comm_spell
+	global ui_comm_spell use_ttk NS
 
 	array unset repo_config_new
 	array unset global_config_new
@@ -110,26 +110,28 @@ proc do_options {} {
 	}
 
 	set w .options_editor
-	toplevel $w
+	Dialog $w
+	wm withdraw $w
+	wm transient $w [winfo parent $w]
 	wm geometry $w "+[winfo rootx .]+[winfo rooty .]"
 
-	frame $w.buttons
-	button $w.buttons.restore -text [mc "Restore Defaults"] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.restore -text [mc "Restore Defaults"] \
 		-default normal \
 		-command do_restore_defaults
 	pack $w.buttons.restore -side left
-	button $w.buttons.save -text [mc Save] \
+	${NS}::button $w.buttons.save -text [mc Save] \
 		-default active \
 		-command [list do_save_config $w]
 	pack $w.buttons.save -side right
-	button $w.buttons.cancel -text [mc "Cancel"] \
+	${NS}::button $w.buttons.cancel -text [mc "Cancel"] \
 		-default normal \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	labelframe $w.repo -text [mc "%s Repository" [reponame]]
-	labelframe $w.global -text [mc "Global (All Repositories)"]
+	${NS}::labelframe $w.repo -text [mc "%s Repository" [reponame]]
+	${NS}::labelframe $w.global -text [mc "Global (All Repositories)"]
 	pack $w.repo -side left -fill both -expand 1 -pady 5 -padx 5
 	pack $w.global -side right -fill both -expand 1 -pady 5 -padx 5
 
@@ -161,7 +163,7 @@ proc do_options {} {
 		foreach f {repo global} {
 			switch -glob -- $type {
 			b {
-				checkbutton $w.$f.$optid -text $text \
+				${NS}::checkbutton $w.$f.$optid -text $text \
 					-variable ${f}_config_new($name) \
 					-onvalue true \
 					-offvalue false
@@ -169,10 +171,10 @@ proc do_options {} {
 			}
 			i-* {
 				regexp -- {-(\d+)\.\.(\d+)$} $type _junk min max
-				frame $w.$f.$optid
-				label $w.$f.$optid.l -text "$text:"
+				${NS}::frame $w.$f.$optid
+				${NS}::label $w.$f.$optid.l -text "$text:"
 				pack $w.$f.$optid.l -side left -anchor w -fill x
-				spinbox $w.$f.$optid.v \
+				tspinbox $w.$f.$optid.v \
 					-textvariable ${f}_config_new($name) \
 					-from $min \
 					-to $max \
@@ -184,11 +186,9 @@ proc do_options {} {
 			}
 			c -
 			t {
-				frame $w.$f.$optid
-				label $w.$f.$optid.l -text "$text:"
-				entry $w.$f.$optid.v \
-					-borderwidth 1 \
-					-relief sunken \
+				${NS}::frame $w.$f.$optid
+				${NS}::label $w.$f.$optid.l -text "$text:"
+				${NS}::entry $w.$f.$optid.v \
 					-width 20 \
 					-textvariable ${f}_config_new($name)
 				pack $w.$f.$optid.l -side left -anchor w
@@ -199,7 +199,7 @@ proc do_options {} {
 					menu $w.$f.$optid.m
 					build_encoding_menu $w.$f.$optid.m \
 						[list set ${f}_config_new($name)] 1
-					button $w.$f.$optid.b \
+					${NS}::button $w.$f.$optid.b \
 						-text [mc "Change"] \
 						-command [list popup_btn_menu \
 							$w.$f.$optid.m $w.$f.$optid.b]
@@ -226,11 +226,17 @@ proc do_options {} {
 			set ${f}_config_new(gui.spellingdictionary) $value
 		}
 
-		frame $w.$f.$optid
-		label $w.$f.$optid.l -text [mc "Spelling Dictionary:"]
-		eval tk_optionMenu $w.$f.$optid.v \
-			${f}_config_new(gui.spellingdictionary) \
-			$all_dicts
+		${NS}::frame $w.$f.$optid
+		${NS}::label $w.$f.$optid.l -text [mc "Spelling Dictionary:"]
+		if {$use_ttk} {
+			ttk::combobox $w.$f.$optid.v \
+				-textvariable ${f}_config_new(gui.spellingdictionary) \
+				-values $all_dicts -state readonly
+		} else {
+			eval tk_optionMenu $w.$f.$optid.v \
+				${f}_config_new(gui.spellingdictionary) \
+				$all_dicts
+		}
 		pack $w.$f.$optid.l -side left -anchor w -fill x
 		pack $w.$f.$optid.v -side right -anchor e -padx 5
 		pack $w.$f.$optid -side top -anchor w -fill x
@@ -248,20 +254,20 @@ proc do_options {} {
 		set global_config_new(gui.$font^^size) \
 			[font configure $font -size]
 
-		frame $w.global.$name
-		label $w.global.$name.l -text "$text:"
-		button $w.global.$name.b \
+		${NS}::frame $w.global.$name
+		${NS}::label $w.global.$name.l -text "$text:"
+		${NS}::button $w.global.$name.b \
 			-text [mc "Change Font"] \
 			-command [list \
-				choose_font::pick \
+				tchoosefont \
 				$w \
 				[mc "Choose %s" $text] \
 				global_config_new(gui.$font^^family) \
 				global_config_new(gui.$font^^size) \
 				]
-		label $w.global.$name.f -textvariable global_config_new(gui.$font^^family)
-		label $w.global.$name.s -textvariable global_config_new(gui.$font^^size)
-		label $w.global.$name.pt -text [mc "pt."]
+		${NS}::label $w.global.$name.f -textvariable global_config_new(gui.$font^^family)
+		${NS}::label $w.global.$name.s -textvariable global_config_new(gui.$font^^size)
+		${NS}::label $w.global.$name.pt -text [mc "pt."]
 		pack $w.global.$name.l -side left -anchor w
 		pack $w.global.$name.b -side right -anchor e
 		pack $w.global.$name.pt -side right -anchor w
@@ -280,6 +286,7 @@ proc do_options {} {
 		set t [mc "Options"]
 	}
 	wm title $w "[appname] ([reponame]): $t"
+	wm deiconify $w
 	tkwait window $w
 }
 
diff --git a/lib/remote_add.tcl b/lib/remote_add.tcl
index fb29422aa7..50029d0cee 100644
--- a/lib/remote_add.tcl
+++ b/lib/remote_add.tcl
@@ -13,45 +13,43 @@ field location     {}; # location of the remote the user has chosen
 field opt_action fetch; # action to do after registering the remote locally
 
 constructor dialog {} {
-	global repo_config
+	global repo_config use_ttk NS
 
-	make_toplevel top w
+	make_dialog top w
+	wm withdraw $top
 	wm title $top [append "[appname] ([reponame]): " [mc "Add Remote"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 	}
 
-	label $w.header -text [mc "Add New Remote"] -font font_uibold
+	${NS}::label $w.header -text [mc "Add New Remote"] \
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.create -text [mc Add] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.create -text [mc Add] \
 		-default active \
 		-command [cb _add]
 	pack $w.buttons.create -side right
-	button $w.buttons.cancel -text [mc Cancel] \
+	${NS}::button $w.buttons.cancel -text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	labelframe $w.desc -text [mc "Remote Details"]
+	${NS}::labelframe $w.desc -text [mc "Remote Details"]
 
-	label $w.desc.name_l -text [mc "Name:"]
+	${NS}::label $w.desc.name_l -text [mc "Name:"]
 	set w_name $w.desc.name_t
-	entry $w_name \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::entry $w_name \
 		-width 40 \
 		-textvariable @name \
 		-validate key \
 		-validatecommand [cb _validate_name %d %S]
 	grid $w.desc.name_l $w_name -sticky we -padx {0 5}
 
-	label $w.desc.loc_l -text [mc "Location:"]
+	${NS}::label $w.desc.loc_l -text [mc "Location:"]
 	set w_loc $w.desc.loc_t
-	entry $w_loc \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::entry $w_loc \
 		-width 40 \
 		-textvariable @location
 	grid $w.desc.loc_l $w_loc -sticky we -padx {0 5}
@@ -59,21 +57,21 @@ constructor dialog {} {
 	grid columnconfigure $w.desc 1 -weight 1
 	pack $w.desc -anchor nw -fill x -pady 5 -padx 5
 
-	labelframe $w.action -text [mc "Further Action"]
+	${NS}::labelframe $w.action -text [mc "Further Action"]
 
-	radiobutton $w.action.fetch \
+	${NS}::radiobutton $w.action.fetch \
 		-text [mc "Fetch Immediately"] \
 		-value fetch \
 		-variable @opt_action
 	pack $w.action.fetch -anchor nw
 
-	radiobutton $w.action.push \
+	${NS}::radiobutton $w.action.push \
 		-text [mc "Initialize Remote Repository and Push"] \
 		-value push \
 		-variable @opt_action
 	pack $w.action.push -anchor nw
 
-	radiobutton $w.action.none \
+	${NS}::radiobutton $w.action.none \
 		-text [mc "Do Nothing Else Now"] \
 		-value none \
 		-variable @opt_action
@@ -85,6 +83,7 @@ constructor dialog {} {
 	bind $w <Visibility> [cb _visible]
 	bind $w <Key-Escape> [list destroy $w]
 	bind $w <Key-Return> [cb _add]\;break
+	wm deiconify $top
 	tkwait window $w
 }
 
diff --git a/lib/remote_branch_delete.tcl b/lib/remote_branch_delete.tcl
index 241642062e..f872a3d89d 100644
--- a/lib/remote_branch_delete.tcl
+++ b/lib/remote_branch_delete.tcl
@@ -23,34 +23,40 @@ field full_cache
 field cached
 
 constructor dialog {} {
-	global all_remotes M1B
+	global all_remotes M1B use_ttk NS
 
-	make_toplevel top w
+	make_dialog top w
 	wm title $top [append "[appname] ([reponame]): " [mc "Delete Branch Remotely"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 	}
 
-	label $w.header -text [mc "Delete Branch Remotely"] -font font_uibold
+	${NS}::label $w.header -text [mc "Delete Branch Remotely"] \
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.delete -text [mc Delete] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.delete -text [mc Delete] \
 		-default active \
 		-command [cb _delete]
 	pack $w.buttons.delete -side right
-	button $w.buttons.cancel -text [mc "Cancel"] \
+	${NS}::button $w.buttons.cancel -text [mc "Cancel"] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	labelframe $w.dest -text [mc "From Repository"]
+	${NS}::labelframe $w.dest -text [mc "From Repository"]
 	if {$all_remotes ne {}} {
-		radiobutton $w.dest.remote_r \
+		${NS}::radiobutton $w.dest.remote_r \
 			-text [mc "Remote:"] \
 			-value remote \
 			-variable @urltype
-		eval tk_optionMenu $w.dest.remote_m @remote $all_remotes
+		if {$use_ttk} {
+			ttk::combobox $w.dest.remote_m -textvariable @remote \
+				-values $all_remotes -state readonly
+		} else {
+			eval tk_optionMenu $w.dest.remote_m @remote $all_remotes
+		}
 		grid $w.dest.remote_r $w.dest.remote_m -sticky w
 		if {[lsearch -sorted -exact $all_remotes origin] != -1} {
 			set remote origin
@@ -62,13 +68,11 @@ constructor dialog {} {
 	} else {
 		set urltype url
 	}
-	radiobutton $w.dest.url_r \
+	${NS}::radiobutton $w.dest.url_r \
 		-text [mc "Arbitrary Location:"] \
 		-value url \
 		-variable @urltype
-	entry $w.dest.url_t \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::entry $w.dest.url_t \
 		-width 50 \
 		-textvariable @url \
 		-validate key \
@@ -81,33 +85,30 @@ constructor dialog {} {
 	grid columnconfigure $w.dest 1 -weight 1
 	pack $w.dest -anchor nw -fill x -pady 5 -padx 5
 
-	labelframe $w.heads -text [mc "Branches"]
-	listbox $w.heads.l \
+	${NS}::labelframe $w.heads -text [mc "Branches"]
+	slistbox $w.heads.l \
 		-height 10 \
 		-width 70 \
 		-listvariable @head_list \
-		-selectmode extended \
-		-yscrollcommand [list $w.heads.sby set]
-	scrollbar $w.heads.sby -command [list $w.heads.l yview]
+		-selectmode extended
 
-	frame $w.heads.footer
-	label $w.heads.footer.status \
+	${NS}::frame $w.heads.footer
+	${NS}::label $w.heads.footer.status \
 		-textvariable @status \
 		-anchor w \
 		-justify left
-	button $w.heads.footer.rescan \
+	${NS}::button $w.heads.footer.rescan \
 		-text [mc "Rescan"] \
 		-command [cb _rescan]
 	pack $w.heads.footer.status -side left -fill x
 	pack $w.heads.footer.rescan -side right
 
 	pack $w.heads.footer -side bottom -fill x
-	pack $w.heads.sby -side right -fill y
 	pack $w.heads.l -side left -fill both -expand 1
 	pack $w.heads -fill both -expand 1 -pady 5 -padx 5
 
-	labelframe $w.validate -text [mc "Delete Only If"]
-	radiobutton $w.validate.head_r \
+	${NS}::labelframe $w.validate -text [mc "Delete Only If"]
+	${NS}::radiobutton $w.validate.head_r \
 		-text [mc "Merged Into:"] \
 		-value head \
 		-variable @checktype
@@ -115,7 +116,7 @@ constructor dialog {} {
 	trace add variable @head_list write [cb _write_head_list]
 	trace add variable @check_head write [cb _write_check_head]
 	grid $w.validate.head_r $w.validate.head_m -sticky w
-	radiobutton $w.validate.always_r \
+	${NS}::radiobutton $w.validate.always_r \
 		-text [mc "Always (Do not perform merge checks)"] \
 		-value always \
 		-variable @checktype
diff --git a/lib/search.tcl b/lib/search.tcl
index b371e9a30a..7fdbf87bcd 100644
--- a/lib/search.tcl
+++ b/lib/search.tcl
@@ -14,15 +14,16 @@ field smarktop
 field smarkbot
 
 constructor new {i_w i_text args} {
+	global use_ttk NS
 	set w      $i_w
 	set ctext  $i_text
 
-	frame  $w
-	label  $w.l       -text [mc Find:]
+	${NS}::frame  $w
+	${NS}::label  $w.l       -text [mc Find:]
 	entry  $w.ent -textvariable ${__this}::searchstring -background lightgreen
-	button $w.bn      -text [mc Next] -command [cb find_next]
-	button $w.bp      -text [mc Prev] -command [cb find_prev]
-	checkbutton $w.cs -text [mc Case-Sensitive] \
+	${NS}::button $w.bn      -text [mc Next] -command [cb find_next]
+	${NS}::button $w.bp      -text [mc Prev] -command [cb find_prev]
+	${NS}::checkbutton $w.cs -text [mc Case-Sensitive] \
 		-variable ${__this}::casesensitive -command [cb _incrsearch]
 	pack   $w.l   -side left
 	pack   $w.cs  -side right
diff --git a/lib/sshkey.tcl b/lib/sshkey.tcl
index 82a1a80ff4..5f75bc96b3 100644
--- a/lib/sshkey.tcl
+++ b/lib/sshkey.tcl
@@ -15,7 +15,7 @@ proc find_ssh_key {} {
 }
 
 proc do_ssh_key {} {
-	global sshkey_title have_tk85 sshkey_fd
+	global sshkey_title have_tk85 sshkey_fd use_ttk NS
 
 	set w .sshkey_dialog
 	if {[winfo exists $w]} {
@@ -23,7 +23,7 @@ proc do_ssh_key {} {
 		return
 	}
 
-	toplevel $w
+	Dialog $w
 	wm transient $w .
 
 	set finfo [find_ssh_key]
@@ -35,9 +35,9 @@ proc do_ssh_key {} {
 		set gen_state   disabled
 	}
 
-	frame $w.header -relief flat
-	label $w.header.lbl -textvariable sshkey_title -anchor w
-	button $w.header.gen -text [mc "Generate Key"] \
+	${NS}::frame $w.header
+	${NS}::label $w.header.lbl -textvariable sshkey_title -anchor w
+	${NS}::button $w.header.gen -text [mc "Generate Key"] \
 		-command [list make_ssh_key $w] -state $gen_state
 	pack $w.header.lbl -side left -expand 1 -fill x
 	pack $w.header.gen -side right
@@ -46,14 +46,16 @@ proc do_ssh_key {} {
 	text $w.contents -width 60 -height 10 -wrap char -relief sunken
 	pack $w.contents -fill both -expand 1
 	if {$have_tk85} {
-		$w.contents configure -inactiveselectbackground darkblue
+		set clr darkblue
+		if {$use_ttk} { set clr [ttk::style lookup . -selectbackground] }
+		$w.contents configure -inactiveselectbackground $clr
 	}
 
-	frame $w.buttons
-	button $w.buttons.close -text [mc Close] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.close -text [mc Close] \
 		-default active -command [list destroy $w]
 	pack $w.buttons.close -side right
-	button $w.buttons.copy -text [mc "Copy To Clipboard"] \
+	${NS}::button $w.buttons.copy -text [mc "Copy To Clipboard"] \
 		-command [list tk_textCopy $w.contents]
 	pack $w.buttons.copy -side left
 	pack $w.buttons -side bottom -fill x -pady 5 -padx 5
diff --git a/lib/status_bar.tcl b/lib/status_bar.tcl
index 51d4177551..5fe3aad382 100644
--- a/lib/status_bar.tcl
+++ b/lib/status_bar.tcl
@@ -13,14 +13,16 @@ field units   {}; # unit of progress
 field meter   {}; # current core git progress meter (if active)
 
 constructor new {path} {
+	global use_ttk NS
 	set w $path
 	set w_l $w.l
 	set w_c $w.c
 
-	frame $w \
-		-borderwidth 1 \
-		-relief sunken
-	label $w_l \
+	${NS}::frame $w
+	if {!$use_ttk} {
+		$w configure -borderwidth 1 -relief sunken
+	}
+	${NS}::label $w_l \
 		-textvariable @status \
 		-anchor w \
 		-justify left
@@ -41,8 +43,8 @@ constructor two_line {path} {
 	set w_l $w.l
 	set w_c $w.c
 
-	frame $w
-	label $w_l \
+	${NS}::frame $w
+	${NS}::label $w_l \
 		-textvariable @status \
 		-anchor w \
 		-justify left
diff --git a/lib/themed.tcl b/lib/themed.tcl
new file mode 100644
index 0000000000..1da458673b
--- /dev/null
+++ b/lib/themed.tcl
@@ -0,0 +1,174 @@
+# Functions for supporting the use of themed Tk widgets in git-gui.
+# Copyright (C) 2009 Pat Thoyts <patthoyts@users.sourceforge.net>
+
+proc InitTheme {} {
+	# Create a color label style (bg can be overridden by widget option)
+	ttk::style layout Color.TLabel {
+		Color.Label.border -sticky news -children {
+			Color.label.fill -sticky news -children {
+				Color.Label.padding -sticky news -children {
+					Color.Label.label -sticky news}}}}
+	eval [linsert [ttk::style configure TLabel] 0 \
+			  ttk::style configure Color.TLabel]
+	ttk::style configure Color.TLabel \
+		-borderwidth 0 -relief flat -padding 2
+	ttk::style map Color.TLabel -background {{} gold}
+	# We also need a padded label.
+	ttk::style configure Padded.TLabel \
+		-padding {5 5} -borderwidth 1 -relief solid
+	# We need a gold frame.
+	ttk::style layout Gold.TFrame {
+		Gold.Frame.border -sticky nswe -children {
+			Gold.Frame.fill -sticky nswe}}
+	ttk::style configure Gold.TFrame -background gold -relief flat
+	# listboxes should have a theme border so embed in ttk::frame
+	ttk::style layout SListbox.TFrame {
+        SListbox.Frame.Entry.field -sticky news -border true -children {
+            SListbox.Frame.padding -sticky news
+        }
+    }
+}
+
+proc gold_frame {w args} {
+	global use_ttk
+	if {$use_ttk} {
+		eval [linsert $args 0 ttk::frame $w -style Gold.TFrame]
+	} else {
+		eval [linsert $args 0 frame $w -background gold]
+	}
+}
+
+proc tlabel {w args} {
+	global use_ttk
+	if {$use_ttk} {
+		set cmd [list ttk::label $w -style Color.TLabel]
+		foreach {k v} $args {
+			switch -glob -- $k {
+				-activebackground {}
+				default { lappend cmd $k $v }
+			}
+		}
+		eval $cmd
+	} else {
+		eval [linsert $args 0 label $w]
+	}
+}
+
+# The padded label gets used in the about class.
+proc paddedlabel {w args} {
+	global use_ttk
+	if {$use_ttk} {
+		eval [linsert $args 0 ttk::label $w -style Padded.TLabel]
+	} else {
+		eval [linsert $args 0 label $w \
+				  -padx 5 -pady 5 \
+				  -justify left \
+				  -anchor w \
+				  -borderwidth 1 \
+				  -relief solid]
+	}
+}
+
+# Create a toplevel for use as a dialog.
+# If available, sets the EWMH dialog hint and if ttk is enabled
+# place a themed frame over the surface.
+proc Dialog {w args} {
+	eval [linsert $args 0 toplevel $w -class Dialog]
+	pave_toplevel $w
+	return $w
+}
+
+# Tk toplevels are not themed - so pave it over with a themed frame to get
+# the base color correct per theme.
+proc pave_toplevel {w} {
+	global use_ttk
+	if {$use_ttk && ![winfo exists $w.!paving]} {
+		set paving [ttk::frame $w.!paving]
+		place $paving -x 0 -y 0 -relwidth 1 -relheight 1
+		lower $paving
+	}
+}
+
+# Create a scrolled listbox with appropriate border for the current theme.
+# On many themes the border for a scrolled listbox needs to go around the
+# listbox and the scrollbar.
+proc slistbox {w args} {
+	global use_ttk NS
+	if {$use_ttk} {
+		set f [ttk::frame $w -style SListbox.TFrame -padding 2]
+	} else {
+		set f [frame $w -relief flat]
+	}
+    if {[catch {
+		if {$use_ttk} {
+			eval [linsert $args 0 listbox $f.list -relief flat \
+					  -highlightthickness 0 -borderwidth 0]
+		} else {
+			eval [linsert $args 0 listbox $f.list]
+		}
+        ${NS}::scrollbar $f.vs -command [list $f.list yview]
+        $f.list configure -yscrollcommand [list $f.vs set]
+        grid $f.list $f.vs -sticky news
+        grid rowconfigure $f 0 -weight 1
+        grid columnconfigure $f 0 -weight 1
+		bind $f.list <<ListboxSelect>> \
+			[list event generate $w <<ListboxSelect>>]
+        interp hide {} $w
+        interp alias {} $w {} $f.list
+    } err]} {
+        destroy $f
+        return -code error $err
+    }
+    return $w
+}
+
+# fetch the background color from a widget.
+proc get_bg_color {w} {
+	global use_ttk
+	if {$use_ttk} {
+		set bg [ttk::style lookup [winfo class $w] -background]
+	} else {
+		set bg [$w cget -background]
+	}
+	return $bg
+}
+
+# ttk::spinbox didn't get added until 8.6
+proc tspinbox {w args} {
+	global use_ttk
+	if {$use_ttk && [llength [info commands ttk::spinbox]] > 0} {
+		eval [linsert $args 0 ttk::spinbox $w]
+	} else {
+		eval [linsert $args 0 spinbox $w]
+	}
+}
+
+# Tk 8.6 provides a standard font selection dialog. This uses the native
+# dialogs on Windows and MacOSX or a standard Tk dialog on X11.
+proc tchoosefont {w title familyvar sizevar} {
+	if {[package vsatisfies [package provide Tk] 8.6]} {
+		upvar #0 $familyvar family
+		upvar #0 $sizevar size
+		tk fontchooser configure -parent $w -title $title \
+			-font [list $family $size] \
+			-command [list on_choosefont $familyvar $sizevar]
+		tk fontchooser show
+	} else {
+		choose_font::pick $w $title $familyvar $sizevar
+	}
+}
+
+# Called when the Tk 8.6 fontchooser selects a font.
+proc on_choosefont {familyvar sizevar font} {
+	upvar #0 $familyvar family
+	upvar #0 $sizevar size
+	set font [font actual $font]
+	set family [dict get $font -family]
+	set size [dict get $font -size]
+}
+
+# Local variables:
+# mode: tcl
+# indent-tabs-mode: t
+# tab-width: 4
+# End:
diff --git a/lib/tools_dlg.tcl b/lib/tools_dlg.tcl
index 5f7f08e239..7eeda9daf2 100644
--- a/lib/tools_dlg.tcl
+++ b/lib/tools_dlg.tcl
@@ -16,53 +16,50 @@ field ask_branch    0; # ask for a revision
 field ask_args      0; # ask for additional args
 
 constructor dialog {} {
-	global repo_config
+	global repo_config use_ttk NS
 
-	make_toplevel top w
+	make_dialog top w
 	wm title $top [append "[appname] ([reponame]): " [mc "Add Tool"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 		wm transient $top .
 	}
 
-	label $w.header -text [mc "Add New Tool Command"] -font font_uibold
+	${NS}::label $w.header -text [mc "Add New Tool Command"] \
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	checkbutton $w.buttons.global \
+	${NS}::frame $w.buttons
+	${NS}::checkbutton $w.buttons.global \
 		-text [mc "Add globally"] \
 		-variable @add_global
 	pack $w.buttons.global -side left -padx 5
-	button $w.buttons.create -text [mc Add] \
+	${NS}::button $w.buttons.create -text [mc Add] \
 		-default active \
 		-command [cb _add]
 	pack $w.buttons.create -side right
-	button $w.buttons.cancel -text [mc Cancel] \
+	${NS}::button $w.buttons.cancel -text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	labelframe $w.desc -text [mc "Tool Details"]
+	${NS}::labelframe $w.desc -text [mc "Tool Details"]
 
-	label $w.desc.name_cmnt -anchor w\
+	${NS}::label $w.desc.name_cmnt -anchor w\
 		-text [mc "Use '/' separators to create a submenu tree:"]
 	grid x $w.desc.name_cmnt -sticky we -padx {0 5} -pady {0 2}
-	label $w.desc.name_l -text [mc "Name:"]
+	${NS}::label $w.desc.name_l -text [mc "Name:"]
 	set w_name $w.desc.name_t
-	entry $w_name \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::entry $w_name \
 		-width 40 \
 		-textvariable @name \
 		-validate key \
 		-validatecommand [cb _validate_name %d %S]
 	grid $w.desc.name_l $w_name -sticky we -padx {0 5}
 
-	label $w.desc.cmd_l -text [mc "Command:"]
+	${NS}::label $w.desc.cmd_l -text [mc "Command:"]
 	set w_cmd $w.desc.cmd_t
-	entry $w_cmd \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::entry $w_cmd \
 		-width 40 \
 		-textvariable @command
 	grid $w.desc.cmd_l $w_cmd -sticky we -padx {0 5} -pady {0 3}
@@ -70,30 +67,30 @@ constructor dialog {} {
 	grid columnconfigure $w.desc 1 -weight 1
 	pack $w.desc -anchor nw -fill x -pady 5 -padx 5
 
-	checkbutton $w.confirm \
+	${NS}::checkbutton $w.confirm \
 		-text [mc "Show a dialog before running"] \
 		-variable @confirm -command [cb _check_enable_dlg]
 
-	labelframe $w.dlg -labelwidget $w.confirm
+	${NS}::labelframe $w.dlg -labelwidget $w.confirm
 
-	checkbutton $w.dlg.askbranch \
+	${NS}::checkbutton $w.dlg.askbranch \
 		-text [mc "Ask the user to select a revision (sets \$REVISION)"] \
 		-variable @ask_branch -state disabled
 	pack $w.dlg.askbranch -anchor w -padx 15
 
-	checkbutton $w.dlg.askargs \
+	${NS}::checkbutton $w.dlg.askargs \
 		-text [mc "Ask the user for additional arguments (sets \$ARGS)"] \
 		-variable @ask_args -state disabled
 	pack $w.dlg.askargs -anchor w -padx 15
 
 	pack $w.dlg -anchor nw -fill x -pady {0 8} -padx 5
 
-	checkbutton $w.noconsole \
+	${NS}::checkbutton $w.noconsole \
 		-text [mc "Don't show the command output window"] \
 		-variable @no_console
 	pack $w.noconsole -anchor w -padx 5
 
-	checkbutton $w.needsfile \
+	${NS}::checkbutton $w.needsfile \
 		-text [mc "Run only if a diff is selected (\$FILENAME not empty)"] \
 		-variable @needs_file
 	pack $w.needsfile -anchor w -padx 5
@@ -182,40 +179,38 @@ field w              ; # widget path
 field w_names        ; # name list
 
 constructor dialog {} {
-	global repo_config global_config system_config
+	global repo_config global_config system_config use_ttk NS
 
 	load_config 1
 
-	make_toplevel top w
+	make_dialog top w
 	wm title $top [append "[appname] ([reponame]): " [mc "Remove Tool"]]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 		wm transient $top .
 	}
 
-	label $w.header -text [mc "Remove Tool Commands"] -font font_uibold
+	${NS}::label $w.header -text [mc "Remove Tool Commands"] \
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.create -text [mc Remove] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.create -text [mc Remove] \
 		-default active \
 		-command [cb _remove]
 	pack $w.buttons.create -side right
-	button $w.buttons.cancel -text [mc Cancel] \
+	${NS}::button $w.buttons.cancel -text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	frame $w.list
+	${NS}::frame $w.list
 	set w_names $w.list.l
-	listbox $w_names \
+	slistbox $w_names \
 		-height 10 \
 		-width 30 \
 		-selectmode extended \
-		-exportselection false \
-		-yscrollcommand [list $w.list.sby set]
-	scrollbar $w.list.sby -command [list $w.list.l yview]
-	pack $w.list.sby -side right -fill y
+		-exportselection false
 	pack $w.list.l -side left -fill both -expand 1
 	pack $w.list -fill both -expand 1 -pady 5 -padx 5
 
@@ -232,7 +227,7 @@ constructor dialog {} {
 	}
 
 	if {$local_cnt > 0} {
-		label $w.colorlbl -foreground blue \
+		${NS}::label $w.colorlbl -foreground blue \
 			-text [mc "(Blue denotes repository-local tools)"]
 		pack $w.colorlbl -fill x -pady 5 -padx 5
 	}
@@ -277,14 +272,14 @@ field is_ok         0; # ok to start
 field argstr       {}; # arguments
 
 constructor dialog {fullname} {
-	global M1B
+	global M1B use_ttk NS
 
 	set title [get_config "guitool.$fullname.title"]
 	if {$title eq {}} {
 		regsub {/} $fullname { / } title
 	}
 
-	make_toplevel top w -autodelete 0
+	make_dialog top w -autodelete 0
 	wm title $top [append "[appname] ([reponame]): " $title]
 	if {$top ne {.}} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
@@ -297,7 +292,7 @@ constructor dialog {fullname} {
 		set prompt [mc "Run Command: %s" $command]
 	}
 
-	label $w.header -text $prompt -font font_uibold
+	${NS}::label $w.header -text $prompt -font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
 	set argprompt [get_config "guitool.$fullname.argprompt"]
@@ -311,12 +306,10 @@ constructor dialog {fullname} {
 			set argprompt [mc "Arguments"]
 		}
 
-		labelframe $w.arg -text $argprompt
+		${NS}::labelframe $w.arg -text $argprompt
 
 		set w_args $w.arg.txt
-		entry $w_args \
-			-borderwidth 1 \
-			-relief sunken \
+		${NS}::entry $w_args \
 			-width 40 \
 			-textvariable @argstr
 		pack $w_args -padx 5 -pady 5 -fill both
@@ -337,18 +330,18 @@ constructor dialog {fullname} {
 		pack $w.rev -anchor nw -fill both -expand 1 -pady 5 -padx 5
 	}
 
-	frame $w.buttons
+	${NS}::frame $w.buttons
 	if {$is_ask_revs} {
-		button $w.buttons.visualize \
+		${NS}::button $w.buttons.visualize \
 			-text [mc Visualize] \
 			-command [cb _visualize]
 		pack $w.buttons.visualize -side left
 	}
-	button $w.buttons.ok \
+	${NS}::button $w.buttons.ok \
 		-text [mc OK] \
 		-command [cb _start]
 	pack $w.buttons.ok -side right
-	button $w.buttons.cancel \
+	${NS}::button $w.buttons.cancel \
 		-text [mc "Cancel"] \
 		-command [cb _cancel]
 	pack $w.buttons.cancel -side right -padx 5
diff --git a/lib/transport.tcl b/lib/transport.tcl
index b18d9c7a1b..60e3a642c5 100644
--- a/lib/transport.tcl
+++ b/lib/transport.tcl
@@ -91,50 +91,55 @@ trace add variable push_remote write \
 proc do_push_anywhere {} {
 	global all_remotes current_branch
 	global push_urltype push_remote push_url push_thin push_tags
-	global push_force
+	global push_force use_ttk NS
 
 	set w .push_setup
 	toplevel $w
+	wm withdraw $w
 	wm geometry $w "+[winfo rootx .]+[winfo rooty .]"
+	pave_toplevel $w
 
-	label $w.header -text [mc "Push Branches"] -font font_uibold
+	${NS}::label $w.header -text [mc "Push Branches"] \
+		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	frame $w.buttons
-	button $w.buttons.create -text [mc Push] \
+	${NS}::frame $w.buttons
+	${NS}::button $w.buttons.create -text [mc Push] \
 		-default active \
 		-command [list start_push_anywhere_action $w]
 	pack $w.buttons.create -side right
-	button $w.buttons.cancel -text [mc "Cancel"] \
+	${NS}::button $w.buttons.cancel -text [mc "Cancel"] \
 		-default normal \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	labelframe $w.source -text [mc "Source Branches"]
-	listbox $w.source.l \
+	${NS}::labelframe $w.source -text [mc "Source Branches"]
+	slistbox $w.source.l \
 		-height 10 \
 		-width 70 \
-		-selectmode extended \
-		-yscrollcommand [list $w.source.sby set]
+		-selectmode extended
 	foreach h [load_all_heads] {
 		$w.source.l insert end $h
 		if {$h eq $current_branch} {
 			$w.source.l select set end
 		}
 	}
-	scrollbar $w.source.sby -command [list $w.source.l yview]
-	pack $w.source.sby -side right -fill y
 	pack $w.source.l -side left -fill both -expand 1
 	pack $w.source -fill both -expand 1 -pady 5 -padx 5
 
-	labelframe $w.dest -text [mc "Destination Repository"]
+	${NS}::labelframe $w.dest -text [mc "Destination Repository"]
 	if {$all_remotes ne {}} {
-		radiobutton $w.dest.remote_r \
+		${NS}::radiobutton $w.dest.remote_r \
 			-text [mc "Remote:"] \
 			-value remote \
 			-variable push_urltype
-		eval tk_optionMenu $w.dest.remote_m push_remote $all_remotes
+		if {$use_ttk} {
+			ttk::combobox $w.dest.remote_m -textvariable push_remote \
+				-values $all_remotes
+		} else {
+			eval tk_optionMenu $w.dest.remote_m push_remote $all_remotes
+		}
 		grid $w.dest.remote_r $w.dest.remote_m -sticky w
 		if {[lsearch -sorted -exact $all_remotes origin] != -1} {
 			set push_remote origin
@@ -145,13 +150,11 @@ proc do_push_anywhere {} {
 	} else {
 		set push_urltype url
 	}
-	radiobutton $w.dest.url_r \
+	${NS}::radiobutton $w.dest.url_r \
 		-text [mc "Arbitrary Location:"] \
 		-value url \
 		-variable push_urltype
-	entry $w.dest.url_t \
-		-borderwidth 1 \
-		-relief sunken \
+	${NS}::entry $w.dest.url_t \
 		-width 50 \
 		-textvariable push_url \
 		-validate key \
@@ -166,16 +169,16 @@ proc do_push_anywhere {} {
 	grid columnconfigure $w.dest 1 -weight 1
 	pack $w.dest -anchor nw -fill x -pady 5 -padx 5
 
-	labelframe $w.options -text [mc "Transfer Options"]
-	checkbutton $w.options.force \
+	${NS}::labelframe $w.options -text [mc "Transfer Options"]
+	${NS}::checkbutton $w.options.force \
 		-text [mc "Force overwrite existing branch (may discard changes)"] \
 		-variable push_force
 	grid $w.options.force -columnspan 2 -sticky w
-	checkbutton $w.options.thin \
+	${NS}::checkbutton $w.options.thin \
 		-text [mc "Use thin pack (for slow network connections)"] \
 		-variable push_thin
 	grid $w.options.thin -columnspan 2 -sticky w
-	checkbutton $w.options.tags \
+	${NS}::checkbutton $w.options.tags \
 		-text [mc "Include tags"] \
 		-variable push_tags
 	grid $w.options.tags -columnspan 2 -sticky w
@@ -191,5 +194,6 @@ proc do_push_anywhere {} {
 	bind $w <Key-Escape> "destroy $w"
 	bind $w <Key-Return> [list start_push_anywhere_action $w]
 	wm title $w [append "[appname] ([reponame]): " [mc "Push"]]
+	wm deiconify $w
 	tkwait window $w
 }