Earth orbits and satellite coverage display in 3D on your laptop.
Open Source Solid Modeling CAD
Video mixer for mixing live and recorded video and audio feeds
Doing 3D with Tcl
PyMOL is an OpenGL based molecular visualization system
THIS SOFTWARE IS IN PRE-PRE-PRE-PRE-ALPHA. So don't really download it
A Tcl/Tk widget for OpenGL rendering.