Comment on dupeGuru ME

Works very well for me - it finds duplicates very effectively. For example, I have a number of classical music tracks that have been tagged in Japanese (automatically chosen by iTunes when I ripped the CD), and it still finds the matching files with English titles. It is a bit pricey, but if you take into account, how much time you would spend to do what the application does manually, it's money well spent. Give it a spin, but read the description before (takes 5 minutes).