Panda3D
From ArtSoftware
Panda3D is a 3D engine : a library of subroutines for 3D rendering and game development. The library is C++ with a set of Python bindings. Game development with Panda3D usually consists of writing a Python or C++ program that controls the Panda3D library.
Panda3D is unusual in that its design emphasis is on supporting a short learning curve and rapid development. It is ideal whenever deadlines are tight and turnaround time is of the essence.
Panda3D was developed by Disney for their massively multiplayer online game, Toontown. It was released as free software in 2002. Panda3D is now developed jointly by Disney and Carnegie Mellon University's Entertainment Technology Center.

