dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
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.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
AllDup - AllDup is a freeware tool for searching and removing file duplicates on your Windows computer.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.