GnuPG is a complete and free replacement for PGP.

Because it does not use the patented IDEA algorithm, it can be used
without any restrictions.  GnuPG is an RFC2440 (OpenPGP) compliant
application.

WWW: http://www.gnupg.org/

Here are modules to use the deprecated (and patented) encodings.

	- sign and check PGP2.x signatures
	- decode PGP2.x messages.
	- You can't encrypt to PGP2.x users.