Leagues

See also:

Case's Ladder - Parent site for multiple competitions, includes links to leagues in specific games.
ClanBase - Includes results and contact information for competing clans.
Elite Clan Warfare - Playing spearhead, Call of Duty:United Offensive, and Counter-Strike:Source. Includes player/team statistics and downloads area.
Multiplayer Games League - Playing Day of Defeat, Half life and Counter Strike series games. Includes past results and news.
Online Gaming League - Includes forums, supported games list, and rules.
ProLeague - Counter-Strike series leagues organised by country. Prizes available.
QuakeCon - Annual event with multiple games. Forum and gallery of previous years.
Squad Games - Includes forums, downloads, results and fixtures.
Stronger than All - Includes results, fixtures, forums, and config files for download.
United Gaming Clans - Playing TFC and Counter-strike. Includes news, fixtures, results, forums, downloads and IRC chat.
WarLeagues - Includes gallery, downloads, forum and competitor information.