S.W.A.T - Includes rules, a roster and an application form. - http://www.swat.moonfruit.com/
Danish Task Force - Playing Raven Shield and Athena Sword. includes forums, roster, match history, weapon guides and a gallery. - http://www.poultorp.dk/dtf/
GameBattles - League for Rainbow Six 3. Offers team standings, forums, and signup instructions. - http://rainbowsix3.ps2.gamebattles.com/
British Elite Espionage Force - Playing Black Arrow. Includes a roster, match summary, and forum. - http://www.ukbeef.co.uk
Fighting Foreign Legion - Playing Raven Shield and Rogue Spear. Offers forums, screenshots and rules for each. - http://teamffl.com
Temple of Pain - [R6,RS] Forum, news, downloads and team roster. - http://www.top4life.com/
EUR Clan (EUR) - Clan information, news, clan battles, schedules, roster, ranking list, screenshots, members and members only section - http://www.eur-clan.com/