You probably don't realize how much drive space you're wasting with duplicate files until you scan it for the first time with a program like NoClone Home.
NoClone Home has been especially designed to find any duplicate files on your hard drive, with a quite high percentage of success. You can choose between scanning the whole disk or just one certain folder, and of course, select the template used by the program to decide which files are duplicate and which not.
I think these templates are the main strength of NoClone Home: there are quite a few to choose from, including duplicate email messages and duplicate MP3 files.
Also, you can create your own template by deciding the elements and features NoClone Home should compare in each file to decide whether they're duplicates or not, which is very useful is none of the templates included suits your needs.
Once NoClone Home finishes scanning the system, it displays a list with all the duplicate files found and enables you to delete them straight away, saving precious hard drive space.
There's even a contest on the developer's website to see who saves the most space thanks to NoClone Home. The program also exports the list to several formats (XML, CSV or XLS; no HTML or TXT, surprisingly).