Stykz

Create animations that you can show off to others or import into other applications.It has a number of great features that make it easier to develop animations, such as onionskinning, individual manipulation of line segments within figures, layering of figures and lines.

Stykz is frame-based, letting you work on individual frames of your animation to make it just right. Onionskins let you see what was in the previous frame so you can make adjustments to your current frame easily.New frames can be created by clicking on the "Next Frame" button in the Frames palette, or by simply hitting the Enter key... in fact, you can use the Enter key while you're manipulating a figure! It's kind of like taking snapshots of the current frame while you're moving or pivoting segments... this feature makes it very easy to get smooth animation.