Links to boat plans some free boat plans, boat building information including plywood stitch and glue. full range of boat plans from sophisticated yachts to plywood. Free plans: absolutely free plans (links to free online boat plans) ariawood boat works (plywood punts, jonboats and one-sheet boats) architectura navalis mercatoria. Barbara butler has been designing and building kids treehouses, playhouses, play forts and custom play structures for over 20 years. her rustic tree houses and unique.