You could have downloaded FindDuplicates 2.0 from our software library for free. This software was originally designed by Nowhere Man. FindDuplicates lies within System Utilities, more precisely File Managers. The most popular versions among FindDuplicates users are 6.0 and 2.0.
From the developer:
Program searches for duplicate files in selected folders. A whole hard disk or just a few folders can be selected. Program will check all files and see if they are duplicates. Since program works by calculating MD5 hashes, it will find renamed files. Also, since MD5 hashes are calculated for just the beginning of the files, files that have been truncated will be found too. In this way, it is possible to find the most complete version of a file.
You may want to check out more software, such as Find Duplicate Messages for Outlook, which might be similar to FindDuplicates.