Anti-Twin!

Directory Opus provides a complete replacement for Explorer with far more power and functionality than any other file manager available today.Just some of the features include: Single or dual pane file display and treesFolder tabs let you keep multiple folders open and switch quickly between themQuickly filter, sort, group and search your foldersSupport for FTP, Zip, 7Zip, RAR and many other archive formatsViewer pane lets you preview images, documents and moreBatch renaming, view and edit file metadataBuilt-in tools including synchronize and duplicate file finderCalculate folder sizes and print or export folder listingsQueue multiple file copies for improved performanceSupport for CD/DVD burningFull support for Windows 7 features like indexed search and jumplistsColor-code your files and folders or assign star ratingsFully configurable user interface - toolbars, keyboard hotkeys and much more can be tailored to suit your needsEfficient, multi-threaded, modern designMuch much more! »

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. It then applies five image comparison filters in order to measure how close pairs of images on the hard drive are.

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.

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, pictures, music or movies.

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 have exactly the same contents regardless of their name, date, time and location. Also, CloneSpy is able to find files that are not exactly identical, but have the same file name. Perhaps you have different versions of a file and you want to find all of them and remove the older versions. CloneSpy can also find zero length files. These are files that have no content. »

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

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.

DoubleKiller searches single or multiple directories for duplicate files by comparing any combination of file name, size, modification date and content. Using user-defined masks like *.mp3 or *.dll you can limit the scan to files that interest you or protect important files from being scanned. Furthermore you can exclude files in a particular file size range or files with certain attributes, like hidden or system files.When the scan is finished a list containing all duplicates found is displayed and you can manually or automatically select the files to be removed. The result list can be sorted and exported to a text file readable by both humans and spreadsheet applications.DoubleKiller is a stand-alone executable that does not need to be installed, just extracted and run, and does not alter the system in any way without the users prior permission. »

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

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 find and delete duplicate files so you won’t experience lack of free disk space!

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 photo collection from duplicates or even similar images.

FDUPES is a program for identifying or deleting duplicate files residing within specified directories.