British Long Distance Swimming Association
Contains reports on events, a calendar of swims, advice for preparation and training for long distance events, links, and photo gallery.
http://www.bldsa.org.uk/

SdogV Productions
Open water swim history of marathon swimmer Ted Erikson (Lake Michigan/English Channel) and pioneer swimming dog Umbra (Bosporous/Dardanelles). Includes long distance links.
http://www.sdogv.com/swim.html

Channel Swimming and Piloting Federation
A comprehensive guide to swimming the Channel, written by swimmers for swimmers, and including links to the list of Channel swims.
http://www.channelswimming.net/

Atlantic City Ocean Marathon Swimming
Includes event guide, meet information, forms, and results for these New Jersey open water swims.
http://www.acswim.org/

Swimming the English Channel
Offers information on Simon Murie's solo swim of the English Channel in September 2002.
http://www.swimtrek.com

River and Lake Swimming Association
Has safety advice, essays, reviews of swimming places, a message board and links to clubs. The Association promotes swimming in natural bodies of water.
http://www.river-swimming.co.uk/

Manhattan Island Foundation
Sponsors of the Manhattan Island Marathon Swim, Great Hudson River Swim, Little Red Lighthouse Swim and the Wrong Way Swim. Collection of articles related to open water swimming, training tips, and information on braving the English Channel.
http://www.nycswim.org/