This license was found on the "crossword" component in texlive 2010. It is Free and GPL-compatible.
%% Author: Gerd Neugebauer %% Im Lerchels.hl 5 %% 64521 Gro.-Gerau %% Mail: email@example.com %% %% Copyright (C) 1995-2009 Gerd Neugebauer %% %% cwpuzzle.dtx is distributed in the hope that it will be useful, %% but WITHOUT ANY WARRANTY. No author or distributor accepts %% responsibility to anyone for the consequences of using it or for %% whether it serves any particular purpose or works at all, unless %% he says so in writing. %%. %% Everyone is granted permission to copy, modify and redistribute %% cwpuzzle.dtx, provided this copyright notice is preserved and %% any modifications are indicated.