GNU-Darwin

GNU-Darwin is a project to package applications for the Mac OS X and Darwin operating systems. They also distribute versions of the Darwin operating system (produced by Apple) and the OpenDarwin operating system which is based on Darwin, although the versions they distribute tend to lag behind the current releases. The project states that its goals are to "focus on projects that leverage our unique combination of Darwin and GNU, and help users to enjoy the benefits of software freedom."

The Darwin developers decided to adopt a mascot in 2000, and chose Hexley the Platypus, over other contenders, such as an Aqua Darwin fish, Clarus the Dogcow, and an orca. Hexley is a cartoon platypus who usually wears a cap resembling a demon's horns. He carries a trident, similar to the BSD Daemon, to symbolize the daemon's forking of processes. Hexley was designed and copyrighted by Jon Hooper; Apple does not sanction Hexley as a logo for Darwin