Jiglibflash is a as3 open source 3D physics engine with a MIT license (ported from c++ Jiglib).

Supported 3D engines are: Away3D, Away3D lite, Five 3D, Sandy 3D and Papervision3D.

The source and examples can be found in the trunk at the SVN (see source tab). There's a flash 9, flash 10 and flash 11 version.

There is no documentation, but you can find a short tutorial in the Wiki.

You can reach our blog at: www.jiglibflash.com/blog.