AS3 3D framework

Away3D
license : https://github.com/away3d/away3d-core-fp11/blob/master/README.txt  ( Apache 2.0  )
link : http://away3d.com/

Flare3D

license : http://www.flare3d.com/buy/
link : http://www.flare3d.com/


Minko

license : https://github.com/aerys/minko ( MIT )
link : http://minko.io/


Alternative3D

license : http://alternativaplatform.com/en/support/ ( free for any project )
link : http://alternativaplatform.com/