JpegDigger - JpegDigger is designed for recovering deleted photos from memory cards but it works on hard drives...
Orion File Recovery - Orion File Recovery Software which as the name suggests, is used to recover any deleted or lost files on your system.
Recuva - Accidentally deleted an important file? Lost files after a computer crash?
Partition Find and Mount - Partition Find & Mount implements a new concept of deleted or lost partition recovery.
myPhoto Recovery - myPhoto Recovery is a utility for recovery of lost and deleted photos.
Pmount - Pmount is software that allows you to mount storage devices or drives into Windows and use them as a normal storage device.