The Mana World is released under the GPL - more info at www.themanaworld.org

SDL is used under the LGPL - more info at www.libsdl.org

SDL_image, SDL_ttf, SDL_mixer and SDL_net are used under the LGPL - more info at www.libsdl.org/libs

physfs is used under the BSD license - more info at http://icculus.org/physfs/

zlib is used under the BSD license - more info at www.zlib.net