Vivid is a modern C++ 3D engine using OpenGL4+
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
3D rendering and scene graph library (moved to GitHub)
Implemention of SGI's Open Inventor.
Functy is a 3D graph drawing package that generates immediate results.
PHIGS (Programmer's Hierarchical Interactive Graphics System)
NOTE: Use Fltk_Contour insted this code!