Draw vector graphics to scale using a descriptive language
Tao3D is a programming language for real-time interactive 3D
Advanced image processing toolbox for Scilab on Unix/Linux/Mac OS
Gphoton in a simple 3d modeler and ray tracer.
Adds a cartoon like subtle effect on your scanned drawing
A C++ Tool for the Fast Prototyping of Topological Data Structures
C++ class library for programming interactive 3D graphics with OpenGL