2D GPU-accelerated framework for ActionScript developers
Exports Flash .FLAs to GPU-friendly formats
DragonBones ActionScript Runtime
DragonBones DesignPanel
A free ActionScript 3 library designed for developing 2D Flash games
The Flixel Power Tools are a set of plug-ins for Flixel 2.5+
Actionscript 3 Particle Engine for Flash and Flex