HTTPS Everywhere is a Firefox and Chrome extension that encrypts your communications with many major websites, making your browsing more secure.
The NoScript Firefox extension provides extra protection for Firefox, Seamonkey and other mozilla-based browsers.
StayInvisible will help you find out how many footprints your Internet browser is leaving.
All applications on your computer that utilize your internet connection will become anonymous with just a click of a button.
Tor protects you by bouncing your communications around a distributed network of relays run by volunteers all around the world.
Free cache, delete cookies, clear Internet history, shred temporary files, delete logs, and discard junk you didn't know was there.