Windows duplicate file finding programs

NEEDS MORE INFO & CONCLUSION

http://www.howtogeek.com/200962/how-to-find-and-remove-duplicate-files-on-windows/

excerpt:

Duplicate Files Finder

http://doubles.sourceforge.net/

Duplicate Files Finder is another barebones-yet-functional open-source application with a no-frills interface. It actually has a different approach from other applications. It looks for files that have the exact same size and only then compares them to see if they’re duplicates of each other.

This means you won’t get the almost-but-not-quite-exact matching features other applications provide. However, it also means that Duplicate File Finder should be even faster at scanning through a larger set of files. if you only care about files that are completely identical and not just almost identical, you can save time with Duplicate File Finder. It doesn’t have the prettiest interface, but it definitely works.

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DoubleKiller:
http://lifehacker.com/290825/find-and-remove-duplicate-files-with-doublekiller


Clone Tools:
Clone Tools is a program that can find duplicate folders. It can also find similar but not identical folders and then lets you merge them or purge all duplicates from one of them.Clone Tools

others:

clonespy - http://www.clonespy.com/

EasyDuplicateFinder: (might be bait and switch pay scheme)
http://lifehacker.com/290824/consolidate-your-data-with-the-easy-duplicate-finder