GLScene Engine for Delphi & C++Builder VCL Windows 32/64
3D Without Boundaries
Pear3DEngine is a modern and modular 3D development framework
Multi-Language Wrapper Collection for the Irrlicht Engine
Free vector,quaternion,matrix math library
Megalui: 2D/3D OpenGL & C/C++ Library for Scientific Visualizations
diagrammatic 3D in a web browser using SVG