Mac users interested in Box2d engine generally download:
Numpty Physics is a drawing puzzle game in the spirit of Crayon Physics using the same excellent Box2D engine. Numpty Physics includes a built-in editor so that you may build (and submit) your own levels. Harness gravity with your crayon and set about creating blocks, ramps, levers, pulleys and whatever else you fancy to get the little red thing to the little yellow thing.
Additional suggestions for Box2d engine by our robot:
SpriteHelper is a texture editor, with advance resampling algorithms and multiple image formats...
Support for engines: Cocos2d Cocos2d
It allows you to manipulate graphically a Box2D world and save it to a file.
manipulate graphically a Box2D...scene that Box2D itself can
A tool to easily define physics body vertices for Chipmunk and Box2D.
Chipmunk and Box2D. You just
