PhotoSweeper will help you if:
• You take a series of shots of the same scene trying to get the perfect one.
• You edit photos with applications, such PhotoShop, Pixelmator, etc., and make backups just in case.
• You have photos scattered on external hard drives and local disks, in iPhoto, Aperture or Lightroom libraries.
• You have a mess in your photo collection or just want to free disk space by removing junk photos.