Recuva

Recuva is a free data recovery software for Windows to recover deleted, formatted, or lost data from PC/laptop, hard drives and memory cards, and iPods.

Recuva guides users through the entire process with a wizard, and a user can do a deep scan to track down all recoverable data, or can limit the search to look for something specific. There is also a secure deletion option which does the exact reverse – it deletes files you are sure you no longer need and renders them unrecoverable.