Summain was originally written Lars Wirzenius . All of the code is currently owned by Lars Wirzenius and licensed under the GNU GPL version 3, or later version. Copyright (C) 2009 Lars Wirzenius 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 3 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. You should have received a copy of the GNU General Public License along with this program. If not, see . On a Debian system, you can find a copy of the GPL version 3 in /usr/share/common-licenses/GPL-3.