Rdfind - Rdfind is a program that finds duplicate files.
fdupes - FDUPES is a program for identifying or deleting duplicate files residing within specified...
Czkawka - Multi functional app to find duplicates, empty folders, similar images etc.
i-DeClone - AI-powered duplicate file search and clean-up. Find identical and similar photos, music, documents etc
dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
AllDup - AllDup is a freeware tool for searching and removing file duplicates on your Windows computer.