cantor : Interface for doing mathematics and scientific computing ( https://kde.org/applications/education/org.kde.canto )
kajongg : Classical Mah Jongg for four players ( https://kde.org/applications/games/org.kde.kajongg )
kig : KDE Interactive Geometry tool ( https://kde.org/applications/education/org.kde.ki )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a sabayon
For Paludis use this rsync : rsync://gentoo.zugaina.org/sabayon-portage
If you have a problem : ycarus(-at-)zugaina.org