Don't know about a specific website, but let me give you a basic overall.
Boats:
There is a a ferry that goes from Ticket and Transportation Center to the Magic Kingdom.
There are small launches that go from Ft. Wilderness, Wildnerness Lodge, and Contemporary.
There are small launches that go from Magic Kingdom, Polynesian, Grand Floridian.
There are friendship boats that go from Ft. Wilderness, Wilderness Lodge, Magic Kingdom.
There are friendship boats that go from Epcot International Gateway, Swan/Dolphin, Yacht/Beach, Boardwalk, Disney MGM Studios and back.
There are friendship boats that go from Future World inside Epcot to World Showcase (You can actually walk faster).
There are boats that go from POFQ, PO Riverside, to Downtown Disney.
There are boats that go from Old Key West to Downtown Disney.
There are boats that go from Saratoga Springs to Downtown Disney.
There are boats that go from DTD WestSide, to DTD Marketplace.
There are also smaller boats you can rent in the various lakes just to ride around for fun.