XFL
Birmingham Thunderbolts, Chicago Enforcers, Las Vegas Outlaws, Orlando Rage, About's XFL Cheerleader Gallery, AskMen.com - The Business of the XFL, XFL Board, XFL Football League @ web62.com, XFL Football News, XFL Links, XFL Rocks
Native American Legends of Football
Includes a history of the Carlisle Indian school football team and profiles of Jim Thorpe and Sonny Sixkiller.
Professional Football Researchers Association (PFR
History of professional football, including the players, teams, leagues, games and stories from the National Football League (NFL), World Football League (WFL), United States Football League (USFL) and other professional leagues.
The Helmet Project
Documents how the helmets for each team have changed over the years, as well as any interesting anecdotes about each.