Free boat plans for the backyard home builder, plywood and wooden sailboats, rowboats, dinghies motorboats. 24 sailboats. boat plan collection. 24 different and unique boat designs. instant download access! sailboat plans for instant download!. General purpose 21′ hull, several wood boat plans to choose from. learn how to build a plywood boat with any of these options: work boat, tour boat, bass boat, deck.