Spine - Spine is 2D animation software designed specifically for software and game development.
slimanimation - to make stick figure or hand drawn animations
Synfig Studio - Just another WordPress site
Brush Ninja - Hand-drawn Animated Gif Creator
DragonBones - DragonBones is an open source project for 2D skeletal animation.
Pencil2D - Pencil2D is an opensource animation/drawing software for Mac OS X, Windows, and Linux, based on old...