Duplicate Media Finder - Duplicate Media Finder locates and deletes identical files and similar media
dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
CloneSpy - CloneSpy is a Free Duplicate File CleanUp Tool for Windows.
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.
AllDup - AllDup is a freeware tool for searching and removing file duplicates on your Windows computer.
Video Comparer - Video Comparer has unique duplicate detection features that you won't find in any other product.