Download the current version of FreeVR: freevr_0.6g.tar.gz.
Download the previous version of FreeVR: freevr_0.6f.tar.gz.
Download the last edition of FreeVR in the 0.5 series (0.5g): freevr_0.5g-gamma.tar.gz.
Download the last edition of FreeVR in the 0.4 series (0.4g): freevr_0.4g.tar.gz.
You can also download Bill Sherman's FreeVR programming tutorials for:
These tutorials examples are technically not open source, but shared to help get new FreeVR programmers up and immersing themselves.