Gemini from MacPaw is one of those utilities you don't use every day, but is extremely handy to have around. The OS X software excels at finding duplicate files on internal drives, external drives or network volumes. It scans a folder at lightning speed, while giving you the option to view your duplicate files and choose which ones you want to remove.
The latest update to Version 1.3 adds the ability to remove duplicates from your iPhoto and iTunes library. The app is a must-have if you're like me and have thousands of photos and song tracks scattered about your drives. Version 1.3 also now supports Mountain Lion and the Retina MacBook Pro. You can find out more about Gemini on
