Works great - very useful
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.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
iTunes Duplicate Song Manager - iTunes Duplicate Song Manager with Folder Watch removes iTunes duplicates in Windows and Mac OS X.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
SongGenie - SongGenie analyzes, identifies and repairs your mp3 tags and names.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode