SDL
	LGPLv2.1
	http://www.libsdl.org/
SDL_image
	LGPLv2.1
	http://www.libsdl.org/projects/SDL_image/
SDL_mixer
	LGPLv2.1
	http://www.libsdl.org/projects/SDL_mixer/
SDL_ttf
	LGPLv2.1
	http://www.libsdl.org/projects/SDL_ttf/
SDL_gfx
	LGPLv2.1
	http://www.ferzkopp.net/joomla/content/view/19/14/
Boost
	Boost license
	http://www.boost.org/
Guile (libguile)
        LGPLv2.1
        http://www.gnu.org/software/guile/
Guile (readline module)
        GPLv2
        http://www.gnu.org/software/guile/
