ClanLib is a cross platform C++ toolkit library with very liberal BSD style license.
This release also contains the complete source code to the examples found on ClanLib's Wiki http://clanlib.org/wiki/Examples that you can use in your own code.
The biggest highlight of this release is the updated software renderer (clanSWRender). It takes advantage of SSE2 code and multicore CPUs for fast rendering. In some cases, it's faster than the current linux nouveau driver running OpenGL 1.x and 2.x.