SecretBurner

SecretBurner is a system utility that destroys all sensitive or confidential information on your computer. The program securely deletes this data and makes it impossible to recover by any computer technique.

It allows you to permanently delete files that may contain sensitive information, including records of your online and offline activities, internet history, browser cookies, passwords and form data entered on websites, temporary files, and even unused disk space (which may contain remnants of previous files, even if the disk has been formatted).