The GNU General Public License, Version 2 or later

This is a Free Software License
This is a copyleft license. We recommend it for most software packages. It allows distribution under version 2 of the GNU GPL, or any version that the Free Software Foundation later releases.

   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, 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, write to the Free Software
    Foundation, Inc., 59 Temple Place, Boston, MA 02111.