From Towodo Software:
Trace Remover will remove all traces of usage on your computer. It removes temporary files, history of opened documents, applications, network locations and much more. You can also choose to remove any custom files, folders or file masks of your choice. Trace Remover is compliant with the US Department of Defense 5520.22-M specification which means that everything you delete will be 100% unrecoverable. Detailed summary reports of actions are displayed so that you can know for sure what has been done.