- Landskrona Segelsällskap (LSS)
- Catamaran en Trimaran Club Nederland (CTC)
- Catclub Zeeland
- Brittish Columbia Multihull Society
- Finnish Catamaran and Trimaran Ass. (SCTL)
- Multihull Deutschland (MD)
- Multihull information Deutschland
- New England Multihull Ass.(NEMA)
- Norske flerskrogs Sejlere
- Svenske catamaran og trimaran sejlklub
- The Stiletto Catamaran Network
- Queensland Multihull Yacht Club (QMYC)
- dragonfly-trimarans.org
- Sylter-catamaran-club.de
- Corsair Open Klassenverreinigung e.V.
- Foreningen af Lystbådshavne i Danmark
- Sikkerhavn