Autodesk's 3D character animation software MotionBuilder 7.5 simplifies keyframe animation and features other enhancements.

Animations are set up by creating keyframes along a timeline. Onion skinning lets you see before and after frames to ensure tween frames are correctly located. Pencil2D is a free and open-source ...

Moho is designed to enable artists to create animated cartoons, and includes drawing and color tools as well as keyframe animation tools, multi-layer compositing and more.