The Snes9x GTK port (C) Brandon Wright <bearoso@gmail.com> is provided under the GNU Lesser General Public License (LGPL) as noted in lgpl.txt, and also under the Snes9x license as noted in snes9x-license.txt. The snes_ntsc filter is licensed under the LGPL 2.1 (lgpl.txt). Particular files may also be the work of other authors, and will note any license information within them. Brandon Wright (bearoso)