Cartoon World
A worldwide focal point for professional and aspiring cartoonists, publishers, collectors and enthusiasts interested in comics, cartoons, and animation to access information about all aspects of the cartoon art form.
http://www.cartoonworld.org

Toonarific Cartoon Archive
Expansive collection of toons from the 1950s through the 1990s, most with screenshots and description.
http://www.toonarific.com/

Toonrific Cartoon Database
Information and episode lists for 70+ cartoons and animated series.
http://www.pazsaz.com/toonrfic.html