A utility which can be used to recover the passphrase for a PGP or GnuPG key.
A utility that makes it easy to back up your OpenPGP keys on dead trees by extracting the secret bytes and printing them out.
A bundle of open source cryptographic software for Microsoft Windows with an installer to make it simple to set up. Includes GnuPG, WinPT and GPA (keyring managers), GPGol (a plugin for Outlook 2003), GPGee (a plugin for the Windows Explorer), and a copy of Claws (an e-mail client that uses GnuPG transparently). Also includes handbooks for newbies with crypto.
A system for allowing the reboot of servers with encrypted hard drives when you arent physically present to type in the passphrases. It relies upon strictly timed encrypted network communications with trusted systems and the use of PGP to decrypt some of the keying material.
A public keyserver for GnuPG and PGP public keys. Submit your key so people can look it up, or search it for keys that you might not have.
The homepage of GPGtools, a port of GnuPG and an associated toolkit to MacOSX. Includes everything you'll need to seamlessly integrate GPG into your desktop experience, from the GPG executable itself to plugins for the Finder, Mail.app, and Mozilla Thunderbird.
A set of instructions for configuring Exim to encrypt every piece of incoming mail by running it through GnuPG before it hits your mail queue. This is used for protecting your e-mail on disk when you don't fully trust your mail server (say, you have a VPS as your mail server, or you don't trust the physical security of where you have your server racked).
Note that you'll have to configure your mail client to transparently run GnuPG to decrypt everything.