MegaGlest source code
You can redistribute this code and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
All the data (including images, sounds, music and 3D models) is provided under the Creative Commons Attribution-ShareAlike (CC-BY-SA) license. This license lets others remix, tweak, and build upon your work even for commercial reasons, as long as they credit you and license their new creations under the identical terms. This license is often compared to open source software licenses. All new works based on yours will carry the same license, so any derivatives will also allow commercial use. For more details about the MegaGlest data see the Authors file.