Havok AI (Commercial – not cheap)
Havok is pretty good at physics, and has been offering behaviour, animation and other kinds of middleware for a while now.
Physics and AI is not easy to get to cooperate, especially animations, so save yourself some time and use Havok.
Highly recommended. 🙂
If you can afford it.
Pros: Industry strength quality, proven technology. Makes AI and Physics cooperate.
Cons: Steep Price.