Math 566
This is a list of site where gif images, many of them animations, may be downloaded an dused without permission. Some are commercial sites, so watch out for what is free and what is copy-protected.
www.animationcreations.com/free/Gif/AnimaitonsIIII.htm
http://pages.sssnet.com/coulet/ (sometimes does not work)
http://www.geocities.com/SiliconValley/Lakes/3361
http://www.geocities.com/SiliconValley/Peaks/4830/
http://www.mergetel.com/~choy/GraphicsRing/
http://www.mcaf.com/freeartsy/