Rebreatherworld - As the name says, it's a rebreather diving board. Very useful to new and experienced rebreather divers. There are lots of extremely experienced divers on it from all over the world. Probably most international board of them all.

TheDecoStop -   Mostly technical diving and member list of full of experienced members. More NorthAmerica-centric than RBW above and been around for much longer.

Ontario Diving - started by the Northern Tech Diver folks and couple of local clubs in 2005. No aliases board - i.e. you have to register with your full name. Probably the best resource for Ontatio diving information.

Scubaboard - from rec to tec with local dive groups as well as lots of international participants. Probably the largest member list of them all

Aquasub - my Local Dive Store. One of the few shops in Toronto with trimix availability & high pressure booster. They teach everything from beginner to full trimix.

Northern Tech Diver - charters in the Kingston area. Also a place to get your GUE classes.

Dive Tech - Increbible selection of dive equipment and toys. Dan Humble (the owner) has anything you can possible want and few things that you did not know you wanted. Full rebreather support.

Ducks Dive - the only choice for Picton area. Closed as of 2013

1000 Islands Pleasure Diving - picks you up at Caigers, near Rockport. My charter of choice for diving Jodrey. Wayne Green is a great captain, the boats are fast and well built for tech gear and cookies and hot soups late/early in the season are to die for!

Milwaukee Public Library snip files - Great Resource! Snip files contain image and the listing of all articles about the vessel of your choice.

Walter Lewis's Marine History of the Great Lakes - newspaper transcriptions. Another great search tool and an amazing site!

Brendon Baillord's Great Lakes Shipwreck Research - a mother of all research sites. Lots of info and links.

Dave Swayze's shipwreck listings - the most complete database

Kingston's Marine Museum

Marine History of the Great Lakes - Historical Documents

History of the Great Lakes. Volume I. A transcription for the Maritime History of the Great Lakes site by Walter Lewis and Brendon Baillod

Toronto Passenger Steamers - Globe and Mail article 1986

Rec and Tec Dive charters - Gary Venet is an unbelievably good captain, Silvia Ann is a great boat for Great Lakes conditions. Gary covers the area from Port Sanilac to Harbor Beach and does both rec and tech

Osprey Dive Charters - Jim Herbert is the charter captain of choice for any technical diving in Eastern lake Erie

Shipwreck Adventures - Greg Such and Little Alexandria are my captain and boat of choice for diving Huron's shipwreck alley and Straits of Mackinac. Grag also runs charters to Gunilda and Bradley.