I put together a set of tools that you can use to quickly get everything needed to make assets for Tremulous and other Quake engine based games. These include Blender, NetRadiant and GIMP as well as the needed scripts and plug-ins for each.
Get the download and updates from The Unvanquished forumsUPDATED
: Download TADA! Win32 Lite
TADA! Lite is a "bare-bones" package, but still has all of the stuff needed to make maps, models, and much more!
Pr0tip: Copy TADA! to all of your friend's computers, and force them to learn character rigging and UV unwrapping for low-poly models while you play minecraft.
Watch this thread for future releases!