Debate Central
Learn how to debate.  This is an excellent site for everything you want to know and learn about debating. Includes online videos, information on how to speak, research and coach debates and more.  Also includes links to the World Debate Institute, the National Forensic League, the World Debate Organization and more.

World Debating Website
A comprehensive list of websites on debating.

The Code of The Debater
A code of ethics for debaters.