Duplicate Commander is a simple but powerful program that allows you to find and manage duplicate files on your computer. It´s designed to be fast and easy to use.

Features:

• Fast search engine
  
• Lightweight
  
• Ability to exclude particular folders and filetypes
  
• Ability to only scan certain filetypes
  
• Ability to scan files of a particular size range
  
• Ability to convert duplicates to NTFS hard links (a link file that points to a single copy of the file)
  
• Allows users to copy/move duplicates to a folder
  
• Ability to undo certain actions through "undo scripts"
  
• Ability to place checkmarks beside files that match certain criteria
  
• Ability to export the duplicate list to the hard drive and then import it back into DC later (without rescanning again)
  
• Find-as-you-type search box allows users to conveniently search through the duplicate list
  
• Able to find duplicates based on filename, filename and extension, filename and size, filename and timestamp, or actual data
  
• Includes an advanced junk finder that finds folders left from poorly written application uninstallers (for ADVANCED users only!)
  
• Free for educational, personal, and professional uses
  

There´s also a portable version available.

System Requirements:

• Windows 98/98SE/ME/2000/XP/2003/Vista/2008/7
  
• 256 MB of RAM (1 GB highly recommended)
  
• 800MHz Pentium 3 Processor
  
• 1 MB of Hard Drive space (200 KB for the portable version)
  
• Microsoft .NET Framework 2.0
• NTFS formatted hard drive (for creating hard links)
  

What´s New in version 2.5:

• Lots of crashes fixed
• Algorithm bugs fixed
• Discarded 4th and 5th memory/speed throttling modes in the Compare by Filename option because too much memory was used
• Added an option to the Help menu for copying author’s e-mail address to the clipboard
• Various message boxes reworded
• Other changes