VRweb is a freely available browser for 3D worlds and scenes modeled
in VRML (the Virtual Reality Modeling Language).

The VRweb developers are no longer supporting VRweb; they have
since written a version in Java called VRwave.  See 
http://www.iicm.edu/vrwave
for info on both packages and how to get them.

VRweb and VRwave are not GNU programs.