Gpg4win 2.0.4 / 2.1.0 Beta
EMail-Security using GnuPG for Windows
Gpg4win is an installer package for Windows with computer programs and handbooks for email and file encryption. Both relevant cryptography standards are supported, OpenPGP and S/MIME. Gpg4win and the software included with Gpg4win are Free Software (among other things free of charge for all commercial and non-commercial purposes).
Download: Gpg4win 2.0.4 / 2.1.0 Beta