www.zonelabs.com - The home of ZoneAlarm a free dynamic firewall for Windows.  Keeps those unwanted visitors out of your computer.

www.grc.com - Another online port scanner, that informs you if your computer is insecure (port 139 wide open?) and what to do about it.
www.grc.com/su-bondage.htm - explains how to close port 139 on Windows based machines.

setiathome.berkeley.edu - Help the search for extra terrestrial intelligence by using your unused processor cycles (runs as either a background process or screen saver). Join the incubus group when you setup your account.