Quake 4 Fortress is a mod for Quake 4 that is nearing the end of internal testing. They are just now accepting application from international applicants of those who want to help with the testing of this great mod. Once this group of test succeed and the final touches are put on the mod, it will be opened up to the public. They have a hopeful goal of September for it's release.

Check out their website for details, applications, videos and much more.