FreeBSD DRM kernel modules for the Direct Rendering 
Infrastructure.  With XFree86 4.0 they provide 3d 
acceleration under X for 3dfx Voodoo3/5/Banshee, 
Matrox G200 and G400, and ATI Rage128 and Radeon cards.

WWW: http://people.freebsd.org/~anholt/dri/