Alternatives to Duff for all platforms with any license

dupeGuru

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...

Free Open Source Mac Windows Linux
Duplicate File Finder Find duplicated files Local based GUI Support for Hotkeys Add a feature

110 Like
Duplicate Cleaner

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...

Freemium $ $ $ Windows
Ability to specify file types wildcards Column sorting aids selections Duplicate File Finder Find similar images Add a feature

140 Like
FSlint

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...

Free Open Source Linux
System Cleanup Duplicate File Finder Gui Add a feature

65 Like
AVG PC TuneUp

Make your old PC live longer — and your new PC run faster — with AVG TuneUp. Our PC optimizer comes with revamped Sleep Mode technology to boost your PC speed and...

Commercial Windows
Battery Saving System Cleanup Duplicate File Finder Utilities that Delete Files ... File Recovery Registry repairing Software Uninstallers System Info Add a feature

147 Like
VisiPics

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...
- Discontinued
  The program seems to be no longer updated. Last version, 1.31, released in February 2013, can be still downloaded from the official website.
Free Windows
Image indentify Compare pictures Duplicate File Finder Find similar images ... Image Preview Visual analysis Add a feature

93 Like
AllDup

AllDup is a freeware tool for searching and removing file duplicates on your Windows computer. The fast search algorithm find duplicates of any file type, e.g., text...

Free Windows
Duplicate File Finder File preview Multi Folders Selection Multi-selection ... Image Preview Duplicate File Finder Partial name compare Add a feature

35 Like
CloneSpy

CloneSpy is a Free Duplicate File CleanUp Tool for Windows. CloneSpy can help you free up hard drive space by detecting and removing duplicate files. Duplicate files...

Free Windows
Duplicate File Finder Portable Add a feature

51 Like
Pixiple

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...

Free Open Source Windows
Duplicate File Finder Portable Image Preview Add a feature

17 Like
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Similarity

Scans your music collection by file contents (acoustic fingerprint) and estimates duplicate audio files.

Freemium $ $ $ Windows
AcoustID audio fingerprints Add a feature

33 Like
Gemini 2

Gemini will quickly find and help you remove duplicates from your Mac. Make this routine task easy and fun with Gemini! Why waste your disk space on duplicates and...

Commercial $ $ $ Mac
Drag n drop Duplicate File Finder Apps with Finder Integration Add a feature

21 Like