The promising and impressive russian 3D engine is available to download at this adress http://alternativaplatform.com/en/alternativa3d/. Usage is free of charge for personal non profit and you must register to download the swc files.

Demos (flash player 10):

API Documentation:
http://help.alternativaplatform.com/en/client/package-summary.html

And tutorials:
http://docs.alternativaplatform.com/dashboard.action, but still written in russian for the moment. It doesn’t matter : AS3 language is international!

Let’s try this engine and compare it with Papervision and Sandy 3D (which are open-source).