As you use your Mac, you may accumulate duplicate files over time. Decloner helps you find those files and remove them, reclaiming wasted space.
Decloner is a very simple application that is easy to use and does its job well. For ultimate reliability it uses SHA-1 hashing algorithm to compare files. This means there is no chance for it to mistake different files for duplicates.
Decloner:
scans for duplicate files in a set of folders, iPhoto or Aperture libraries that you choose
compares files using SHA-1 cryptographic hash algorithm for ultimate reliability
shows duplicate files in groups and allows selecting multiple files for deletion
displays selected file information and QuickLook preview
allows to auto-select duplicate files quickly, keeping the newest in a set of duplicate files, preferring Aperture files to iPhoto files to ordinary stand-alone files
puts deleted files into Decloner virtual Trash, allowing you to safely put back files you changed your mind about, and protecting you from accidentally deleting the files
makes sure at least one copy of a file is preserved when deleting duplicates
never actually deletes files—for your ultimate peace of mind when you 'delete' files, Decloner puts them into Trash, iPhoto Trash, or tags them with 'Duplicate' keyword in Aperture, so that you can always recover them unless they are manually deleted