DriveTidy is a disk cleanup utility that thoroughly scans your computer for unnecessary and invalid files no longer used by the system freeing up disk space.
It removes items that are missed by the built-in Windows Disk Cleanup as well as other popular cleaning tools.
Editor's Note:
This program can be very aggressive. It erased my FTP password and add-ons for Firefox. They are easy to restore, but still... Not for novice users.