Nektony (http://nektony.com/) has introduced Duplicate Expert 2.0, an update of the cleanup utility for Mac OS X.
Duplicates Expert was developed specifically to help anyone find and delete all duplicate content, including hidden files as well as inspect duplicate files and folder – even similar folders. It can scan at a time as many folders and drive as you selected.
Duplicates Expert requires Mac OS X 10.9 or later and costs US$1.99. It’s available at the Mac App Store.