Cat-alist  
   Portal for catamaran sailing enthusiasts from maxis to beach cats to racing to cruising: headlines on beach catamaran events, issues, notices, news, classifieds.
   http://www.cat-alist.com

Multihulls.com  
   Resource for current and future multihull owners and sailors, with information about boat shows, sales, charters, publications, and news.
   http://www.multihulls.com/

Worrell 1000  
   The Worrell 1000 catamaran race from Virginia Beach to Florida.
   http://www.worrell1000.com

Themultihulls.com  
   Find forums, symposiums, meeting schedules, and news relating to catamarans and trimarans.
   http://www.themultihull.com

Sail-Fever.net  
   A compilation of locations to sail a Hobie cat. Lists and reviews of rental agencies and training facilities which cater to catamaran sailing.
   http://www.sail-fever.net

Florida Multihull Sailor  
   News of multihull regattas in Florida, contains race schedules, reviews, and photography.
   http://www.floridamultihullsailor.com/

Outrigger Sailing Canoes  
   Covers all types of outrigger sailing conoes and proas known as flying or Micronesian proas. Includes history and specifications of proas from 16 to 52 feet.
   http://homepages.paradise.net.nz/garyd/

Beachcats  
   UK site covers the European catamaran race news, has reviews, photography, and discussion of boat designs.
   http://www.beachcats.com/

Dragonfly Trimarans User Forum  
   International (independent) user forum for Dragonfly 800, 920, 1000 and 1200 Trimarans. Including information exchange on all aspects of Dragonfly Trimarans plus news and dates and For Sale/Wanted page.
   http://dragonfly-trimarans.org

TheBeachcats.com  
   Offers sailing pictures, repair tips, news, free classified ads, and a mailing list.
   http://www.TheBeachcats.com/

UK Catamaran Racing Association  
   Portal site with links to all United Kingdom catamaran class associations, includes mailing list, forums, directory, calendar, and classified ads.
   http://www.catamaran.co.uk

Yahoo! Groups : beachcats  
   Mailng list devoted to discussion of sailing small catamaran sailboats known as Beachcats. Site offers chat, file storage, web links, photo albums, and message archive.
   http://groups.yahoo.com/group/beachcats

ProaSail  
   Proa sailboat instruction, plans, and demonstrations. Includes drawings and construction photos.
   http://www.proasail.com

Sail 4 Speed  
   Site of a one off trimaran for racing against itself. We try to optimize the multihull to reach speeds above 30 knots.
   http://www.sail4speed.com

1Design.Net  
   Florida catamaran sailing, includes discussion forum, photos, videos, club links, schedule, classifieds, and one design fleets
   http://www.1design.net