dupliFinder is a graphical tool that searches directories on your computer for duplicate files by checking and compairing the MD5 sum of each file. This means that the contents of the file is examined, not the filename.
DupeFinder is a simple application for locating, moving, renaming and deleting duplicate files in a directory structure. It's perfect both for users who haven't kept their hard drives very well organized and need to do some cleaning to free space and for users who like to keep lots of backup copies of important data "just in case" something bad should happen.