Owner's Manual

7. Cygwin from cygwin.com
Open Source URL:
http://www.cygwin.com/
License:
GNU General Public License (GPL),
http://cygwin.com/licensing.html
8. The GNU Privacy Guard (Gpg4win) from gnupg.org
Open Source URL:
http://www.gnupg.org/download/index.en.html
License:
GnuPG is Free Software under the terms of the GNU General Public License,
http://www.gnu.org/copyleft/gpl.html