cinepaint : motion picture editing tool used for painting and retouching of movies ( http://www.cinepaint.org/ )
darktable : Darktable is a virtual lighttable and darkroom for photographers ( http://darktable.sf.net/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a edwtjo-ebuilds
For Paludis use this rsync : rsync://gentoo.zugaina.org/edwtjo-ebuilds-portage
If you have a problem : ycarus(-at-)zugaina.org