WhatSize

WhatSize is a file system utility that allows you to quickly view and reclaim disk space.

WhatSize quickly measures the size of your hard drive and allows you to sort, filter, and refine the results. The files and folders are automatically sorted by size with the biggest sizes first.

A visual display of the contents of your hard drive that enables you to drill-down and discover how your disk space is being used.

Intelligent tools that suggest ways you can reclaim disk space. Such as unused language locales, unused binary portions from universal applications, etc.

Identifies duplicate files on your system so that you can remove them. You would be surprised at how many useless files might be laying around on your hard drive.