Slamdbuilds-beta is a project mainly written in ..., it's free.
jkwood's "experimental" slamd64builds tree
This is jkwood's personal repo of slamd64builds. Why, you ask? Because some things aren't ready to go into the main tree at builds.slamd64.com. Some things require KDE 4, which is not (yet) in the mainline. Others are extremely special-purpose. Also, pprkut is doing it too.