simulationcraft : SimulationCraft is a tool to explore combat mechanics in the popular MMO RPG World of Warcraft. It is a multi-player event-driven simulator written in C++ that models raid damage. ( http://simulationcraft.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a Drauthius
For Paludis use this rsync : rsync://gentoo.zugaina.org/Drauthius-portage
If you have a problem : ycarus(-at-)zugaina.org