Enigmail for Thunderbird

Enigmail is a data encryption and decryption extension for Mozilla Thunderbird and the SeaMonkey internet suite that provides OpenPGP public key e-mail encryption and signing. Enigmail works under Microsoft Windows, Unix-like, and Mac OS X operating systems. Its cryptographic functionality is handled by GNU Privacy Guard.

CryptUp: Gmail Encryption in 60 Seconds

CryptUp is the simplest PGP application for Gmail. This application makes it extremely easy to create encrypted email within Gmail. There’s no need to understand how PGP works. CryptUp just works. CryptUp adds a new button in Gmail called SECURE COMPOSE. It lets you send encrypted emails to anyone. Just click on in, write your…