FlashPunk is a free ActionScript 3 library designed for developing 2D Flash games. It provides you with a fast, clean framework to prototype and develop your games in. This means that most of the dirty work is already done, letting you concentrate on the design and testing of your game.
Not only is FlashPunk absolutely free, it also contains everything you'll need to make the game you want. From its robust and dead-simple sprite-based graphics handling to its powerful live debugger, you won't need a team of berets and neckbeards to make your game come to life.
Helper classes for animations, tilemaps, text, backdrops, and more with z-sorted render lists for easy depth management.
Fast and manageable rectangle, pixel, and grid collision system with a plethora of built-in collision options.
Powerful motion tweening for linear, curved, and path-based movement as well as spritesheet support and image transformation.
Sound effect support with volume, panning, and fading/crossfading, complete with one-line sound playback.
Quick and efficient particle effects and emitters allow for beautiful particle systems without slowing things down.
Framerate-independent and fixed-framerate timestep support allow you to decide what mode is best for you and your game.
Simple keyboard and mouse input state checking makes setting keys and events incredibly easy, yet powerful.
Handy console for real-time debugging and information tracking. It even allows moving the camera and inspecting entities while playing!
If all this just isn't enough and you absolutely require a team of berets and neckbeards, the FlashPunk Developers community is an incredible resource eager to answer any question you can fathom. Oh, and its free as well.