The wordgame programs are made available under the terms of the GNU General Public License (GPL). A copy of the GNU GPL is included in the wordgame distribution as COPYING-GPL. Various word lists are included with the wordgame package in the files words.txt, obscure.txt, and 2of12inf.txt. These word lists are provided in various GPL-compatible licenses, (GPL, MIT-like, public domain, and similar). The details of the licenses can be found in COPYING-wordlists.