Topic: Endorphin
This is the best program ever for committing random acts of violence towards a group of CGI crash-test-dummies, like running them over with cars, and dropping boxes on them. Or in other words, using ragdoll physics to see how your character should move, or just getting the whole dang program to do it for you.
About the only thing I've done with this program so far is messed with the demos; but I do admit, it extremely hilarious watching guys leap off of buildings towards helicopters, only to get punched out of the air by a rather large box.
EDIT: I should point out that this program is not for figuring out how your LEGO mini-figures should move. At least, not yet...
CGI LEGO! Updated occasionally...