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.  8′ puddle duck racer one design racing sailboat based on bolger brick. developmental class, defined hull, unlimited sail rig and underwater fins.. Free plans? yes, they are really free, hundreds of them. the plans offered at this site are free public domain boat plans. choose a category at the left, choose.