sailorswim
- U.s and abroad local association for all skill level multihull sailors for site specific information such as launch site , prevailing conditions ,big brother lesson contacts , courses ,competitions and charity trader.
- http://sailorswim.com

ProaSail
- Proa sailboat instruction, plans, and demonstrations. Includes drawings and construction photos.
- http://www.by-the-sea.com/saltys/index.html

Supernova fan
- Supernova trimaran construction details plus links and a discussion forum.
- http://www.supernova-fan.dk/uk_index.htm

The Kalia Foundation
- Non-profit organization developed to preserve and extend the Polynesian Seafaring tradition.
- http://www.kaliafoundation.org

Proafile
- Articles on the sailing, design, development, building, racing, and history of proas.
- http://www.proafile.com

Multihull Maven
- Profiles all boat models, brands, designers, yards, and associations. News and feature articles and used boat search.
- http://www.multihull-maven.com

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

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

Yahoo! Groups : Beachcats
- Mailing 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/

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

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

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

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

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

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

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