Vandelay Industries: Episodes, interviews, quotes and more.
Stan the Caddy: One of the most active sites around. Forum, scripts, forum, glossary, quotes and more.
Seinaholic: Icons from the show, trivia, interesting facts and more.
Official Sony Pictures Site: Some good trivia, map of New York locations in Seinfeld, and more.
Kartelle Seinfeld Page: Picture Gallery and Forum
Wikipedia Entry: Need I say more?
Seinology: Forum, Seinfeld Survivor, Seinfeld Scripts, Lots of Pictures, Scripts from Fans, Great Site
Cosmo Kramer: A site dedicated to Kramer.
Seinfeld FAQ’s: Amazing site, answers to every possible question. Fabulous!
All 180 Scripts: The best site I have found for scripts.
Seinfeld Scripts: Another good scripts site.
Seinfoff: Photographs from the last days of Seinfeld.
Unofficial Seinfeld Encyclopedia: Great statistics and random information.
Seinfeld Screen Saver: Not sure if it works with Vista.
Seinfeld Dictionary: Definitions of words and phrases unique to Seinfeld.
Sweat the Small Stuff: Blog of comedian Kristen Carney aka “The Female Larry David”.