The downside is a rather poor use of frames to display the collection. Huge collection of credited GIF animations. These folks set the standards for the animation's you see on the web. Includes tutorials on how to make your own animated GIFs and an ongoing gallery of contest winners and runner-ups. Another large collection of Gifs from all parts of the web.
Simple interface makes viewing the collection easy.
All animation's are of high quality. Includes a nice tutorial on making your own animation's as well as clip art and animation CD's you can purchase online. An online reference to dither-proof colors for web pages. Select a color and it gives you both the HEX and RGB equivalent.