A project that has moved to GitHub
Doing 3D with Tcl
realistic driving simulation + functions for 2D/3D graphics
A shader-based software renderer written from scratch in C89
3D rendering and scene graph library (moved to GitHub)
free implementation of the OpenGL Character Renderer
3D Software Renderer in 700 Lines
PHIGS (Programmer's Hierarchical Interactive Graphics System)
Multi-Language Wrapper Collection for the Irrlicht Engine
A Tcl/Tk widget for OpenGL rendering.