Cookienator is a tool that will help you remain anonymous from search engines such as Google and other notorious web-usage trackers such as Doubleclick or Omniture.
Many websites install cookies in your browser, and these little bits of tracking data will be used to identify you for as long as you keep using your computer. In the past few years I have been alternating between religiously clearing my cookies from time to time, or neglecting to do so with hope that these corporations will live up to their vague promises of doing no evil.
Then I decided that it'd be more productive to automate the whole thing, so I spent a good chunk of a weekend creating the first version of Cookienator, a simple program that will leave most of your cookies alone but will remove the ones that put your privacy at risk.