dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
AllDup - AllDup is a freeware tool for searching and removing file duplicates on your Windows computer.
CleanMyMac X - Clean, protect and speed up your Mac
Czkawka - Multi functional app to find duplicates, empty folders, similar images etc.
WinZip System Utilities Suite - Top-rated PC utility software to clean, update, maintain and protect your PC for good. Free Download for Windows and Mac.