Use the old gtk2 GUI instead of the gtk3 one

Packages describing “gtk2” as local USE flag

Package “gtk2” Flag Description
net-misc/youtube-viewer Use the old gtk2 GUI instead of the gtk3 one
app-admin/gtkdiskfree Support GTK+ 2.x instead of GTK+ 3.x
app-i18n/fcitx Install input method module for GTK+ 2
x11-misc/e16-keyedit Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-editors/gvim Enable GTK+2 interface
media-gfx/graphviz Enables gtk+ output plugin -Tgtk (needs cairo)
app-i18n/ibus-unikey Enable support for x11-libs/gtk+:2
app-i18n/uim Enable support for x11-libs/gtk+:2
www-client/netsurf Build GTK2 GUI
net-analyzer/pinger Install the gtkpinger GUI utility based on x11-libs/gtk+:2
mail-client/claws-mail Build support for GTK+-2 instead of GTK+-3 (live ebuild only)
dev-util/geany Use GTK+2 instead of GTK+3
net-misc/putty Build the PuTTY client with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
x11-themes/zuki-themes Install GTK+2 theme
media-libs/libcanberra Enables building of gtk+ helper library, gtk+ runtime sound effects and the canberra-gtk-play utility. To enable the gtk+ sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.
app-i18n/ibus Enable the GTK-2 input method module
media-libs/lvtk Enable x11-libs/gtk+:2 based GUI support
x11-themes/arc-theme Install GTK+2 theme
app-i18n/imsettings Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-i18n/im-chooser Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
x11-misc/gtkdialog Build with GTK+2 instead of GTK+3

All packages providing a “gtk2” USE flag (14)