1)   DeDupe 1.6.4
DeDupe is a duplicate file finder that deletes duplicate file from the hard disk. It finds and removes duplicate files safely.

 2)   Duplicate Checker 2.1
Duplicate Checker is a powerful tool for finding duplicate images, songs and any other file types. Using this utility you can organize files on your hard disk or server storage. Image preview and thumbnails bars are available for finding images.