These ebuilds come from http://dev.gentoo.org/~serkan.
If you have some problems, go to the official site first.
extcalc : Extcalc scientific calculator based QT ( http://extcalc-linux.sourceforge.net/ )
graphthing : A tool that allows you to create, manipulate and study graphs ( http://graph.seul.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a serkan-overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/serkan-overlay-portage
If you have a problem : ycarus(-at-)zugaina.org