Physaxe is a 2D Rigid Body Library written in haXe. It's been highly optimized for the Flash 9 Player, with the best optimizations available.

Physaxe is based on several existing physics engines, mainly :

• Box2D, the reference open source physics engine
• Glaze, an AS3 engine which is a port of Chipmunk, itself based on Box2D

Physaxe features are :

• rigid body consisting in several shapes
• shapes supported are circles, segments (with rounded edges) and arbitrary convex polygons
• customizable broadphase (currently bruteforce and y-sorted list are available)
• island resolution and sleeping (allow ~0 CPU to be spent when groups are sleeping)
• constraint solver based on Box2D sequential impulses
• customizable body properties, such as linear/angular friction and maximized motion

What to give it a try ? Read the Tutorial

And watch the Demo