dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Rdfind - Rdfind is a program that finds duplicate files.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
FSlint - FSlint is a utility to find and clean various forms of lint on a filesystem. I.E.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.