open source
AS3 Geom Exporter
AS3 Geom Class Exporter is a 3DS Max designed script that allows you to directly export 3D models to AS3 classes.
[FR] http://not-so-stupid.com/open-source/as3-geom-exporter/
[EN] http://not-so-stupid.com/open-source/as3-geom-exporter-english/
WOW-Engine
WOW-Engine is a free AS3 open source physics engine written by Seraf ( Jérôme Birembaut ) capable to handle positions in a 3D environment.
[FR] http://not-so-stupid.com/open-source/wow-engine/
[EN] http://not-so-stupid.com/open-source/as3-3d-physics-engine-wow-engine/


