Hi all,
The latest development version of Crystal Space (i.e. very recent 1.3) now has updated support for Bullet 2.64. The support is not complete yet. We still have to wrap several parts of our physics API to Bullet but the basic rigid body support for boxes and spheres is working.
For people who don't know. Crystal Space is an Open Source and portable 3D Engine that runs on GNU/Linux, Windows, and MacOS/X. You can find more information at http://www.crystalspace3d.org.
Greetings,