Tune Sweeper - Show duplicates in your Music library. Automatically select which duplicates to keep and delete based on your preferences. Remove duplicates with one-click from your iTunes or Music app library.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
iTunes Duplicate Song Manager - iTunes Duplicate Song Manager with Folder Watch removes iTunes duplicates in Windows and Mac OS X.
Avast Cleanup - Next generation tuneup and cleanup for your PC
SongGenie - SongGenie analyzes, identifies and repairs your mp3 tags and names.
Advanced System Optemizer - Clean, optimize and personalize your PC