FlightGear Flight Simulator: free open-source multiplatform flight sim
An interactive viewer for three-dimensional chemical structures.
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Interactive 3D Layout Viewer for GDSII
Earth orbits and satellite coverage display in 3D on your laptop.
rayshade and POV for Mathematica Export + view
Tao3D is a programming language for real-time interactive 3D
PyMOL is an OpenGL based molecular visualization system
3D Charts - Templates for PovRay(TM)
This project is no longer active. See vpython.org.