The Linux Alternative Project - linuxalt.com

This page offers a list of linux software grouped by their equivalent Win32 counterparts.  This list is an good way to find interesting and useful software you never knew existed.

Add encryption to Gmail - Lifehacker
Lifehacker wrote

Greasemonkey script Gmail Encrypt adds encryption to the emails you write in Gmail.

http://lifehacker.com/software/email/add-encryption-to-gmail-177061.php