Duplicates Finder is extremely specialized tool. It can be used to check for duplicate lines or words in 2 files. Along with the list of duplicates, it can produce versions of the files with excluded duplicates; join the two files stripping the duplicates and few more options.
Full Specifications
What's new in version 3.1
General
ReleaseApril 6, 2012
Date AddedMarch 28, 2012
Version3.1
Operating Systems
Operating SystemsWindows 2003, Windows 2000, Windows Vista, Windows 98, Windows Me, Windows, Windows NT, Windows 7, Windows XP