Fraud.org
This is one of the National Consumer League's sites dedicated to educating and informing the public about fradulent activites. They also provide: PhishingInfo.org

Federal Trade Commission
The FTC offers a number of documents highlighting some of the most prevalent web scams. The site has facts for consumers about scams and consumer alerts.

Internet Crime Complaint Center
The U.S. Federal Bureau of Investigation (FBI) and National White Collar Crime Center (NW3C) have teamed up and provided a site for people who have been scammed.

MovingScam.com
The creators were scammed by a moving company and decided the best way to fight back was to create a website to educate people preparing to hire a moving company.

419 Coalition
A site dedicated to educating the public about "419" scams. 419 represents the code Nigerian law passed to combat an evolving scam network in their country.

Cyber Criminals Most Wanted
Started in 1999, they tout being a cybercrime awareness, prevention, and safety website.