For those of you who use the Mac, I don't know anything about the software programs for that. Here's a link with Mac Graphic Software
Pure Mac: Graphics - Software for Macintosh. Look for programs that use the word animations. Anyone knowing of a good program please post in this thread. These are two programs that I have been told that work with the Mac
GIMP - Free software downloads and reviews - CNET Download.com, and one that sounds more difficult
Blender (PowerPC) - Free software downloads and reviews - CNET Download.com.