- epernod (Erik Pernod)
- OpenCTM library is an Open source, with a very liberal license (zlib/libpng license).
OpenCTM — the Open Compressed Triangle Mesh file format — is a file format, a software library and a tool set for compression of 3D triangle meshes. The geometry is compressed to a fraction of comparable file formats (3DS, STL, VRML, COLLADA...), and the format is easily accessible through a simple, portable API.
Library information and source can be found here: http://openctm.sourceforge.net/ Performance comparisons are available here: http://openctm.sourceforge.net/?page=performance