This article is from the PGP FAQ, by Jeff Licquia jalicqui@prairienet.org with numerous contributions by others.
PGPShell
Author: James Still <still@kailua.colorado.edu>
ftp://oak.oakland.edu/pub/msdos/security/pgpshe33.zip
mailto:still@rintintin.colorado.edu (subject "send shell")
Another PGP shell for DOS.
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PGS
ftp://oak.oakland.edu/pub/msdos/security/
Pretty Good PGP Shell or PGS is a complete shell for Philip Zimmermann's
Pretty Good Privacy (PGP). PGS enables you to do anything that PGP can do
from the commandline from a, easy to use, front-end shell.
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PGPUtils
ftp://ftp.dsi.unimi.it/pub/security/crypt/PGP/
Batch files and PIF files for PGP.
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PC Yarn
Author: Chin Huang <cthuang@io.org>
ftp://oak.oakland.edu/SimTel/msdos/offline/ (xx is version number)
MS-DOS offline mail and news software (using the SOUP packet format)
that can clearsign or encrypt outgoing messages, and decrypt incoming
messages to the CRT, a text file, or a mail folder.
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MAC
========
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NeXT
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CryptorBundle
ftp://ftp.informatik.uni-hamburg.de/pub/comp/platforms/next/Mail/apps/
CryptorBundle-1.0.NI.b.tar.gz
Integrates PGP into Mail.app.
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OS/2
========
EPM Macro for PGP
Author: John C. Frickson <frickson@gibbon.com>
ftp://ftp.gibbon.com/pub/gcp/
Macro for EPM which places a PGP menu in the menu bar.
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Unix
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PGPsendmail
ftp://ftp.atnf.csiro.au/pub/people/rgooch/
ftp://ftp.dhp.com/pub/crypto/pgp/PGPsendmail/
ftp://ftp.ox.ac.uk/pub/crypto/pgp/utils/
Automatically encrypts by acting as a wrapper for sendmail.
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PGPTalk
ftp://ftp.ox.ac.uk/src/security/
Integrates PGP into ytalk for secure private chatting.
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Emacs Auto-PGP
Author: Ian Jackson <ijackson@nyx.cs.du.edu>
This is a package for integrating PGP into GNU Emacs.
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Mailcrypt
Author: jsc@mit.edu (Jin S Choi), patl@lcs.mit.edu (Patrick J. LoPresti)
ftp://cag.lcs.mit.edu/pub/patl/mailcrypt/
This is an elisp package for encrypting and decrypting mail. I wrote this to
provide a single interface to the two most common mail encryption programs,
PGP and RIPEM. You can use either or both in any combination.
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mail-secure.el
Author: Travis J. I. Corcoran (tjic@icd.teradyne.com)
mailto: tjic@icd.teradyne.com
Complement to Mailcrypt which adds some new features. Requires Mailcrypt.
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