VisiPics - VisiPics does more than just look for identical files, it goes beyond checksums to look for similar...
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
Pixiple - Find images similar in pixel and/or metadata content
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.