WeeDuplicateDetective

This software helps you find and handle (delete, send to the recycle bin or move to a folder) duplicates of files. In other words, if you have unneeded copies of files, WDD will find them and will help you clean them.
IMPORTANT for XP & Vista users: WDD requires the .NET Framework 4.0 (here: http://www.microsoft.com/download/en/details.aspx?id=24872 )
Why use WeeDuplicateDetective?
* Its 100% free
* Its easy to use
- All you need is in one screen
- There's an integrated tutorial
- the user interface is organized like reading a book page: left to right and top to bottom
* It doesnt install any ads, malware or toolbars
* It presents the collected information efficiently
- Duplicates are shown as sub items of the first found occurence
* It gives you a lot of control over what you can do with the duplicates
- Combine many criteria defining what files should be considered as duplicates
- Search the list of duplicates to find specific items
- Mark the files that you want to clean up with a variety of selection schemes. Use the context menu for more options, applying to a specific item in the list.
- Sort the found duplicates in different ways, to get a better view of what you can / should clean
- Remove some specific items from the list of duplicates to get a better overview
- Some file types can even be previewed
-- pictures: JPG, GIF, TIFF, BMP and PNG
-- audio and video: everything Windows Media Player can play (MP3, WMA, MPG, AVI, MP4, etc.)
-- some text files
- Decide yourself how to clean the duplicates you want to be cleaned
* Its nice to look at
* Its nonetheless still fast
* Its evolving and maturing - Share your ideas for -- new features -- new user interface.

What is new in this release:

• remember the search patterns (in the combobox)
• lighter UI
• less borders, less color gradients and less animations (speeds up the UI)
  
• the process of finding duplicates has its own dialog
• layout made a bit less "full" for some options, mostly in the right side bar
• removed a couple of unneeded text fields (ironically, I had duplicate information...)
  
• files unsafe for deletion
  
• show those files (files in the Windows directory and system and hidden files)
• exclude those files from being selected or even remove them from the list
• search
• all fields at once
  
• using wildcards (* and ?) or a regular expression
  
• allow filtering of search files per file extension
• new dialog to edit the type filters
  
• add one criteria to remove files from the list
• bug fixes
  
• display of amount of files cleaned & of files scanned
• crash when cleaning all files in a duplicate group
• cursor when finding duplicates
• remove files from list: stats not updated
• help file (FINALLY!) - html file, with style reminiscent of this site.

Requirements:

.Net Framework 4.0