About our free boat plans: the free boat plans listed here are public domain plans. we have put them together into a more usable format than most free boat plans. Home / boat plans & kits catalog / power cruisers: power cruisers. trailerable cruisers, trawlers, yachts fly bridge express cabin cruiser :. Learn how to build yourself a houseboat in your backyard. our complete boat plans collection is available for free and immediate download. it is the largest wood boat.