Most files are licensed under the GNU General Public License (GPL) version 2, or (at your option) any later version. See "LICENSE-GPL2" in the root of this distribution. The files in the scripts/python/ directory are released under GNU General Public License (GPL) version 3, or (at your option) any later version. See "LICENSE-GPL3" in the root of this distribution. The Perl client module (scripts/perl/Nut.pm) is released under the same license as Perl itself. That is to say either GPL version 1 or (at your option) any later version, or the "Artistic License".