Cached

News site that follows the progress of several leagues.
http://www.cached.net/

Cyberathlete Amateur League

A division of the Cyberathlete Professional League for North America. With leagues in first person shooter and real-time strategy games, includes team information and downloads.
http://www.caleague.com/

Global Gaming League

With ladders for real-time strategy, first person shooter, and sports games. Includes media area.
http://www.ggl.com/

GameBattles.com

Includes reviews, previews, screenshots and competition information.
http://www.gamebattles.com/

Cyberathlete Professional League

Includes player information and upcoming events.
http://www.thecpl.com/

Savage Ladders

With news, forums and searchable team information.
http://www.savageladders.com

ClanWars

Includes results and news. Also allowes users to purchase and run their own ladder.
http://www.clanwars.cc

Combat Zone

Spanning multiple platforms, includes results, ladder information, and links to game reviews.
http://www.thecombatzone.net/

Combat Zone

Playing first person shooter, real-time strategy and flight similation games. Includes results and information.
http://www.czleagues.com

Ecliptical Realms Online Gaming Statistical Community

Playing first person shooter and space shooters, includes player and team rankings.
http://www.eclipticalrealms.com

FraggedNation

Playing first person shooter and racing games. Includes results, forums, and news.
http://www.fraggednation.com

Gamer Z Leagues

Playing Sci-Fi and first person shooter games. Main site has forums and news, also includes sub-sites for each game with information and results.
http://gzleagues.com

Major League Online

Competing in first person shooter and real-time strategy games, with results, forum and IRC chatroom.
http://www.theMLO.com

World Gaming League

With results, fixtures and information for first person shooter and real-time strategy games. Includes a paid-for web design service.
http://wgleague.com

Gaming League

Playing real-time strategy and first person shooter games. Includes forums, results, fixtures and replays for download.
http://www.ggleague.com/