GnuPG

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 a RFC2440 (OpenPGP) compliant application.
Price USD 0
License Free
Version 1.4.11
Operating System Windows 95, Windows 2000, Windows 98, Windows, Windows XP, Windows NT
System Requirements None