It includes source/binaries via PPMs, tarball, ZIP and SVN. Note: Install GLUT first.
It adds support for 53 new openGL extensions, including FrameBuffer Object and Vertex/Fragment Program extensions.
It's been tested on Windows (NT/XP/Vista) and Linux (Fedora 6, Ubuntu/Dapper).
Free also posted C vs Perl OpenGL benchmarks: http://graphcomp.com/opengl/bench.html