CompanyCRYPT server based email encryption
- CompanyCRYPT for MIMEsweeper is a server based email encryption for PGP and S/MIME. Encryption and signing happens central and without any interaction of the user. CompanyCRYPT allows virus scanner and anti-spam filter to check encrypted eMails.
- http://www.companycrypt.com

Windows Privacy Tray
- WinPT (Windoze Privacy Tray) is a taskbar utility for doing data en- or decryption. This program is free software under the terms of the GNU GPL. For this WinPT uses the GNU Privacy Guard.
- http://winpt.sourceforge.net/en/

Seahorse
- Seahorse is a Gnome front end for the GnuPG (Gnu Privacy Guard) file encryption/decryption program. Both English and Japanese support is provided.
- http://seahorse.sourceforge.net/

PGPClick
- PGPClick is a front-end for Pretty Good Privacy (for Windows)
- http://users.stargate.net/~rewilson/PGPClick/

Command Code
- SpyShield PGP encryption plug-in for instant messaging, including MSN Messenger Service. Site provides information about security, PGP encryption, and related technologies.
- http://www.commandcode.com/index_static.html

Aegri Somnia Encryption Engine
- This site is a web interface for PGP. It sends, signs, decrypts, and verifies messages.
- https://www.aegri-somnia.com

Envelope for Mac
- Offers Envelope plug-in for Eudora on the Mac. Also features a download of the demonstration version.
- http://www.mtt.com/envelope/

PGP Tools from Net Services - Mollusc 5
- Plugin for various mail programs running on DOS and Windows. Information about supported mail programs and download aera.
- http://www.compulink.co.uk/~net-services/pgp/

Empics/Peics pages
- Information about plugins for Eudora including manuals, FAQ, and a download page.
- http://www.xs4all.nl/~comerwel/pgpeudra/

PGP Frontends
- A collection of local and external links to frontends for DOS, Windows, and other platforms.
- http://www.hauert.net/pgpmain.html

Belize Offshore PGPmail
- PGPmail provides SSL and PGP/GPG encrypted secure offshore webmail from the privacy haven of Belize.
- http://pgp.bz

DOS-based PGP Frontends
- List of directly downloadable PGP Front-ends for DOS.
- http://www.hauert.net/pgpdos.html

PGP/MIME - Secure E-mail Clients
- Excellent list of email-clients that support PGP/MIME. It includes additional information such as operating system, plugins and PGP/MIME advantages in general.
- http://www.bretschneidernet.de/tips/secmua.html.en