Remo Duplicate Photos Remover - Get rid of duplicate photos from your iPhone.
VisiPics - VisiPics does more than just look for identical files, it goes beyond checksums to look for similar...
Duplicate Photos Remover - Duplicate Photos Remover is a free, smart, and powerful Android tool that helps you eliminate duplicate and similar look photos and free up valuable storage.
Pixiple - Find images similar in pixel and/or metadata content
Cisdem DuplicateFinder - Cisdem DuplicateFinder offers a accurate way to find and remove duplicates.
SimilarImages - A free application designed to find similar images (duplicates) on your HDD.