mcell/LICENSE.txt

Copyright (C) 2006-2017 by
The Salk Institute for Biological Studies and
Pittsburgh Supercomputing Center, Carnegie Mellon University

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

For the complete terms of the GNU General Public License, please see this URL:
http://www.gnu.org/licenses/gpl-2.0.html