Crystal Space is a free (LGPL) and portable 3D Game Development Kit written in
C++.  It supports: true six degrees of freedom, colored lighting, lightmapped
and stencil based lighting, shader support (CG, vertex programs, fragment
programs, ...), mipmapping, portals, mirrors, alpha transparency, reflective
surfaces, 3D sprites (frame based or with skeletal animation using cal3d
animation library), procedural textures, particle systems, halos, volumetric
fog, scripting (using Python, Perl, Java, or potentially other languages),
16-bit and 32-bit display support, OpenGL, and software renderer, font support
(also with freetype), hierarchical transformations, physics plugin based on ODE

WWW:	http://www.crystalspace3d.org