cairo : A vector graphics library with cross-device output support ( https://www.cairographics.org/ https://gitlab.freedesktop.org/cairo/cairo )
gtk+ : Gimp ToolKit + ( https://www.gtk.org/ )
talkatu : GTK widgets for chat applications ( https://keep.imfreedom.org/talkatu/talkatu )
wxGTK : GTK version of wxWidgets, a cross-platform C++ GUI toolkit ( https://wxwidgets.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a pg_overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/pg_overlay-portage
If you have a problem : ycarus(-at-)zugaina.org