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Flump converts Flash keyframe animations into texture atlases and XML or JSON that can be easily integrated into any scene graph-based 2D game engine. Sparrow and Starling are supported out of the box!
Texture & Font Generation
With TexturePacker, making spritesheets is easy and fast. TexturePacker supports many input data formats and exports to a lot of gaming frameworks. It has both GUI and commandline interface and lots of features to help you optimize your sprites to reduce memory usage and improve performance.
The ultimate bitmap font tool for OS X and Windows. Create beautiful designs using highly configurable effects, definable backgrounds, zooming & full-screen. Sparrow and Starling will load its font files natively!
PhysicsEditor is a GUI tool to create collision shapes within seconds! Without specifying any additional options PhysicsEditor already creates very good results, but you also have enough options available to adjust things to your needs.
The Number one particle effects editor designed specifically for Mac. Choose from a massive user submitted library or design your own unique effects. Use Sparrow's Particle plugin to integrate those particle systems into your game in no time.