Window Washer is a useful privacy and cleanup tool. It deletes your browser usage tracks and much more.
A cool feature for the paranoid is the file “Bleaching” for added Security: Window Washer can completely overwrite files with random characters making them unrecoverable by undelete / unerase utilities — a security feature which “exceeds the tough standards of the United States Department of Defense.”
It can be set to run automatically for example each time you shut down or start up your computer. It also has a cookie keeper feature that allows you to save chosen cookies from useful sites you use while erasing all other cookies. Hundreds of Free Plug-ins are available to cleanup the junk files of a lot of popular applications. It also supports most major browsers.
For more detailed features check out the site here where you can download the trial.