Awesome Duplicate Photo Finder - Awesome Duplicate Photo Finder is a free powerful tool, that helps you to find and remove duplicate...
Duplicate Media Finder - Duplicate Media Finder locates and deletes identical files and similar media
Fast Duplicate File Finder - Find and Remove Duplicate Files, Find Similar Files, Free Duplicate File Finder will Delete Duplicate Files, MP3, iTunes, Songs, Images, Photos and Picture Files.
VisiPics - VisiPics does more than just look for identical files, it goes beyond checksums to look for similar...
Pixiple - Find images similar in pixel and/or metadata content
AntiDupl - AntiDupl.NET can find and display duplicate images in the main graphic formats: JPEG, GIF, TIFF...