AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Dupscout - DupScout is a powerful, fast and easy-to-use duplicate files finder utility allowing one to detect...
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.
Similarity - Similarity - Remove similar, duplicate MP3, music, audio files by content, tags. Check your music collection quality, remove unquality music. Organize your music collection.
FSlint - FSlint is a utility to find and clean various forms of lint on a filesystem. I.E.
Audio Dedupe - AUDIO DEDUPE Music Manager will delete duplicate mp3 files, find similar songs, delete duplicates from iTunes. Organize music files and save disk space.