From Patagames Software:
Gamedev Animation Studio is a software for creating and editing sprite-based animation. With this editor you can easily create animated sprites in no time. You can use special animation curves to add stunning visual effects and prepare your animation for using in your projects. Gamedev Animation Studio allow you to export built animation to RAW file, to c++/c# classes or to set of png images or avi file. To top it all off, you can sync animation with existing audio with various effects. Gamedev Animation Studio is the best priced sprite-based editor on the market today. It creates custom animating curves and smooth moving sprites.