The Nebula Device is an Open Source 3D game and visualisation engine, see http://www.nebuladevice.org

It has support for scripting languages (e.g. Tcl, Lua, Python).

It is available at SourceForge.
The binary distribution comes with customized interpreters 
with built-in 3d capabilities, and some demos.  

Try it out... it's impressive.

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[Category 3D Graphics]