Alternatives to Doublekiller 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...
- Discontinued Not sure about "discontinued", but this is unmaintained https://github.com/hsoft/dupeguru/issues/484#issuecomment-365817860
Free Open Source Mac Windows Linux
Duplicate File Finder Find duplicated files Local based GUI Support for Hotkeys Add a feature

88 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
Duplicate File Finder Find similar images Add a feature

132 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- Discontinued The program seems to be no longer updated.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
Duplicate File Finder Image Preview Visual analysis Add a feature

90 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
Duplicate File Finder Add a feature

59 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

47 Like
MacPaw 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

20 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 Partial name compare Add a feature

27 Like
Anti-Twin

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...
- Discontinued Last version 1.8d from 2010, see http://www.joerg-rosenthal.com/en/antitwin/
Free Personal Windows
Duplicate File Finder Duplicate image finder Image compare Multiple languages ... Image Preview Add a feature

23 Like
Auslogics Duplicate File Finder

Daily computer activity inevitably leads to accumulating duplicate files on your computer, especially if you are an active PC user. Auslogics Duplicate File Finder will...

Free Windows
Duplicate File Finder Add a feature

20 Like
Fast Duplicate File Finder

Fast Duplicate File Finder will help you find fast all duplicate files in a folder and its sub folders. The applications will compare the content of your files so it...

Freemium Windows
Duplicate File Finder Add a feature

23 Like
Easy Duplicate Finder

Easy Duplicate File Finder is a powerful tool that helps you to find and remove duplicate files from your PC or Mac. Features: - Delete duplicates automatically...

Commercial Mac Windows
Duplicate File Finder Add a feature

27 Like
Awesome Duplicate Photo Finder

Awesome Duplicate Photo Finder is a free powerful tool, that helps you to find and remove duplicate photos on your PC. With this program you can easily clean up your...
- Discontinued The program is no longer updated. Last version, 1.1, released in October 2012, can be still downloaded from the official website.
Free Windows
Portable Image Preview Add a feature

13 Like
FCorp File & Folder Tools

Collection of File & Folder Related Tools . Feature List : 1. Attribute Changer 2. Batch Folder Creator 3. DateTime Changer 4. Duplicate Finder 5. File...
- Discontinued Development of FCorp Software has been discontinued in 2016. Last version of File & Folder Tools, released in August 2016, can be still downloaded from SoftPedia.
Free Windows
Change File Dates Duplicate File Finder File Searching Utilities that Delete Files ... Portable Add a feature

16 Like
FCorp Cleaner++

Cleaner++ is a handy and reliable application designed to perform a quick cleanup Unused registry entries, Junk Files, as well as to uninstall programs from the computer.
- Discontinued Development of FCorp Software has been discontinued in 2016. Last version of Cleaner++, released in July 2016, can be still downloaded from SoftPedia.
Free Windows
Duplicate File Finder Portable Software Uninstallers Add a feature

13 Like
DupDetector

Dup Detector finds duplicate and near duplicate images by opening and reading image pixel data. The program is easy to use, just specify the path and start the scan. You...
- Discontinued The official website is no longer available. Last version, 3.3.02, released in August 2011, can be still downloaded from Wayback Machine
Free Windows
Compare pictures Image Preview Add a feature

12 Like