This is a port of the classic computer game "Sopwith" to run on modern computers and operating systems. It is named "SDL Sopwith" as it was originally based only on the LibSDL graphics library. There is now also a port to Gtk+, the widget library used by GNOME and there is initial code written toward a backport allowing it to be run under DOS, like the original.
This is based on the original sopwith code, which is available as Free Software under The GNU General Public License!