The Amel Yacht Owners Discussion Group (For owners of yachts built by Chantiers Amel in La Rochelle, France: Kirk, Meltem, Fango, L'Euros, Mango, Maramu, Sharki, Santorin and Super Maramu)
The Canadian Space Geodesy Forum (Scientists and engineers working with the techniques of space geodesy: Navstar, GPS, Glonass, Transit, very long baseline interferometry, satellite laser ranging, satellite altimetry, etc.)
ClassicYacht ("Developed for the benefit of classic yacht enthusiasts who desire a forum where they may share not only our common interest, but also our passion for the traditional yachts of yesteryear")
CootWorld (Discussion forum for fans of the Coot full-time four-wheel drive, amphibious, articulated ATV)
Dieselnet: Diesel Emissions Online (Internet forum to facilitate the exchange of technical and business information on diesel emissions and their control)
Dock Walk (A discussion forum for the yachting professional)
The H-Maritime Mailing List (For scholars interested in maritime history to discuss research interests, teaching methods and the state of maritime affairs)
I Boat Northwest (An online community of Pacific Northwest power cruising enthusiasts)
The Marine History Information Exchange Group (The Marhst-L mailing list, "an international electronic discussion group sponsored and administered by the Marine Museum of the Great Lakes at Kingston with the assistance of Queen's University at Kingston")
The Mariners-L Mailing list (Dedicated to research into the mariners and ships of the merchant marine and the world's navies)
The Marinette Boat Forum (For Marinette owners, aluminum Roamer owners and other aluminum boat boaters)
Rivermen & Riverboats (About Captain Cornelius McGee who worked for the Streckfus Steamboat Lines out of St. Louis along with information about other river people as well, also lots of steamboat photos)
The Waterfront Modeling Discussion Group (For modelers of waterfront features such as docks, piers, wharfs, fishing boats, canneries, bait shops, lobster traps, and waterfront junk)
The Yacht-L Mailing List (A virtual yacht club and a discussion list about sailing, yachting, cruising, racing, sail trimming, boat maintenance, rigging, stories about sailing, history sometimes, boat building and repair)
The International Marina Institute (A marine trade organization which encompasses all segments of the marina business on both a National and International basis)