Sling-Shot-Game---Box2D-AS3 is a project mainly written in ActionScript, it's free.
Clients are asking for Angry Bird clones with their own spins.
Sling Shot Game is probably going to be a clone of Angry Birds... This is what clients seem to want. It uses the AS3 port of Box2D - version 2.1 Box2D has been included with this project, and the Sling Shot Game must reference this code in order to compile.
Many Box2D utilites have been created to assist in the prouction of the Sling Shot Game.