Gphoton in a simple 3d modeler and ray tracer.
Perl bindings to the Modern OpenGL API
3D .NET engine for Windows, Linux, Mac
rayshade 4.0.6 linux patch
PHIGS (Programmer's Hierarchical Interactive Graphics System)
3D game engine for C and C++
Pear3DEngine is a modern and modular 3D development framework
Collections of abstractions for Pure Data
Multi-Language Wrapper Collection for the Irrlicht Engine
A C++ library to easily create GUI-editable objects
Volume Rendering library in Java