Czkawka is a simple, fast, written in Rust and easy to use app to remove unnecessary files from your computer.

dupeGuru is a free and open source tool to find duplicate files on your computer. It can scan either filenames or contents. The filename scan features a fuzzy matching algorithm that can find duplicate filenames even when they are not exactly the same.

Duplicate Cleaner is a tool for finding and removing duplicate files from your computer or network drives; It is intended to be used on user content - documents, photos, images, music, but can be used to scan any type of files.

AntiDupl.NET can find and display duplicate images in the main graphic formats: JPEG, GIF, TIFF, BMP and PNG. The comparison is based on the contents of the files, so the program can find not only almost identical, but similar images.

VisiPics does more than just look for identical files, it goes beyond checksums to look for similar pictures and does it all with a simple user interface. First, you select the root folder or folders to find and catalogue all of your pictures.

FSlint is a utility to find and clean various forms of lint on a filesystem. I.E. unwanted or problematic cruft in your files or file names. For example, one form of lint it finds is duplicate files. It has both GUI and command line modes.

i-DeClone discovers and removes duplicate and similar files from your PC and mobile phone. It will remove the clutter from your media, photo and document collections, and leave your PC storage tidy, with 3 easy steps:

Easy Duplicate File Finder is a powerful tool that helps you to find and remove duplicate files from your PC or Mac.

Ollie is a smart assistant that organizes your camera roll, categorizes your photos, and ensures privacy by storing data on your device.

Pixiple searches your files for images that are similar in pixel and/or metadata content and presents you with a sorted list of similar image pairs to compare and manipulate. Pixiple is open source, no-nonsense, unrestricted and completely free.

Find Duplicate Photos with Image Comparer - Duplicate Photo Finder software. The program is able to detect even resized or rotated duplicate photos due to advanced comparison algorithm

Anti-Twin is a small software application which compares files, i.e. it searches for duplicate or similar files on your hard disk drive. All similar or identical files that were found can either be sent to the recycle bin or directly deleted.