AS3 3D and physics engines

2D physics engines:

APE

This engine may be the most well-known one. It has been ported to C++ and Java. MIT license.

Box2DAS3Box2DFlashAS3

Crayon Physics Deluxe made the people attracted to this engine. Box2D was written in C++, now ported to AS3 as Box2DFlashAS3. zlib/ligpng licence.

FOAM

It was lately released, but seems worth trying. MIT license.

Fisix

Perhaps you do not know this engine because of its own license. Let's check the demo.

Motor Physics

This one is expected to join the AS3 physics engine list. Some demos are already available. zlib/libpng license.

This seems a little complicated compared with C++. In C++, there are practically two choices of 3D physics engine, PhyX and Havok. Which engine will survive? 3D graphics engine:

Papervision3D

I think that I do not need to explain about this most known 3D engine. MIT License.

Away3D

This engine is Papervision3D based one, but has has better visual quality.

Sandy

I immediately understood this name because I am a Japanese (see why). The API resembles Java3D, e.g. TransfomGroup class.

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Corrected the name of Box2DFlashAS3. (Nov. 23)