Greasemonkey script Gmail Encrypt adds encryption to the emails you write in Gmail.
Not all people uses encryption. But when your e-mail does all the Business stuff you should encrypt your conversations. This script can only be used from FireFox and you will need the Greasemonkey extention to make it work.
Greasemonkey script [...]

blueorganizer is a Firefox extension that allows you to easily collect and manage your favorite things like books, music and movies. [...]

Portable Gaim allows you to carry your instant messaging client with you on a USB thumbdrive, iPod, portable hard drive or any other portable media. You can plug it right into any Windows computer and use it just like you would on your own. It is a repackaged version of the popular Gaim IM client [...]