Duplicate Media Finder - Duplicate Media Finder locates and deletes identical files and similar media
AllDup - AllDup is a freeware tool for searching and removing file duplicates on your Windows computer.
dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
Inbox by Process Street - Blast through your tasks in record speed
Duplicate Cleaner - Duplicate Cleaner: the fastest and most popular tool for finding duplicate files. Over 1 million downloads: Get your copy now! Free and Pro versions available.
Duplicate Directories and Files Finder - command line utility to find duplicate directories and files