C++ Frontend for the RenderMan Interface
C++ header-only library that simulates GLSL math
Xj3D is an open-source Java codebase for the X3D Graphics standard.
Rayshade raytracer
3D Charts - Templates for PovRay(TM)
Gimpel3D - 2D/3D Stereo Conversion Editor
Pear3DEngine is a modern and modular 3D development framework
XNavigator is a Virtual Earth browser and viewer for http://osm-3d.org