I credit myself, the author, Richard Thrippleton

Also:

Andreas Schiffler supplied SDL_rotozoom code and was kind enough to bend the licensing a little
Nick Taylor, Jonathan Irwin and Ronny Bangsund helped with testing and miscellaneous hacking
Eugenia Loli-Queru helped me get the code portable enough to compile on BeOS
Idan Sofer gave enormous help with debugging the maths, and also for continued support and suggestions
Andy Davidson was good enough to provide a machine for the Star Voyager public server
And finally Sam Lantinga for writing SDL