Xj3D is an open-source Java codebase for the X3D Graphics standard.
C++ header-only library that simulates GLSL math
realistic driving simulation + functions for 2D/3D graphics
3D Without Boundaries
3D Charts - Templates for PovRay(TM)
3D .NET engine for Windows, Linux, Mac
Webgl Engine
Pear3DEngine is a modern and modular 3D development framework
Game engine supporting many 3D/2D formats and graphic effects