The SMS Server Tools 3 are under the General Public License.
SMS Server Tools 3
Copyright (C) 2006- Keijo Kasvi
Based on SMS Server Tools 2, http://stefanfrings.de/smstools/
SMS Server Tools version 2 and below are Copyright (C) Stefan Frings.
This program is free software unless you got it under another license directly
from the author. 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.
General Public License, English