- PGP Corporation
 - Helps companies secure e-business operations through firewall, encryption, and intrusion detection. - Command Code
- Offers PGP encryption plugins for instant messaging and provides information about security, PGP encryption, and related technologies.
- DOS-Based PGP Frontends
- envelope v1.0
- Adds a customizable floating toolbar to your Eudora application. A single mouse click encrypts and decrypts your email as well as records and plays voice messages.
- Father Bill Morton's PGP Page
- How he uses PGP to take confessions via email.
- GNU Privacy Guard
- GnuPG is a complete and free replacement for PGP.
- International PGP Home Page
- Contains updated information, FAQs and relevant links regarding the latest PGP versions.
- MIT distribution site for PGP
- PGP Distribution Authorization Form
- How to get pgp2.6.2
- PGP Frontends
- For Unix, OS/2, and Mac.
- pgp.net
- Source for information about PGP using various protocols such as WWW, FTP, and email.
- PGPfone
- PGPfone aka Pretty Good Privacy Phone is a desktop cryptogrphic telephony application available for download from MIT.
- Private Idaho
- A freeware Windows frontend to PGP, anonymous remailers, and nym servers.
- Stamper: A PGP Digital Timestamping Service
- Details about Stamper, a free PGP digital timestamping service which operates via Internet email.
- Tom McCune's page for Pretty Good Privacy
- Includes descriptions of software available, plugins, and more.
- Tsuruta's MacPGP Page
- Learn MacPGP in Japanese! This page explains MacPGP2.6.3i, the international version to you. Japanese pages only.
- Windows PGP Frontends
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