Swashbucklers of the 7 Skies is role-playing game by Chad Underkoffler, published by Evil Hat Productions in 2009. I played in a brief campaign using it in 2010, where the GM Jens ran for four players: myself (John), Gareth, Daniel, and Renee.
Our adventures included finding an ancient tunnel that stretched through the floating island we lived on, and unscrupulous sorts posing as monks based at the top entrance.