History Washer Pro
Here's a good, freeware utility for protecting your privacy. Although many Windows users aren't aware of it, PCs retain a hidden record of your online activities. This program removes all traces of your Net surfing history, E-mail correspondence, etc. Note: there's an option on this site that lets you get a serial number to register the program, for free

Net brute Scanner
How safe is your network? This freeware tool lets you locate dangerous and easily exploitable security holes in your network. NetBrute Scanner includes three helpful network utilities that are the same types of tools that have long been available to UNIX-equipped hackers. [For Windows]

Stealth Message
Are you worried about the security of your E-mail? A free service, StealthMessage.com offers a secure messaging system that encrypts your private messages and stores encrypted messages anonymously. The service is easy to use and there's nothing to download.