FolderSizes is an app (or website) that provides users with an easy and powerful way to analyze, manage, and report on the size, location, and structure of their hard drives, network shares, and other storage resources. It offers a variety of features such as disk space usage analysis, folder size analysis, file size analysis, file type analysis, and more. It also provides graphical visualization of disk space usage, and offers an integrated file search and duplicate file finder. FolderSizes can be used to identify large, old, temporary, and duplicate files, as well as to view and manage disk storage resources. It can also generate detailed reports that provide insight into the structure and usage of storage resources.
Discontinued The program seems to be no longer updated. The latest version, 2.13, released in July 2012, is fully functional and can still be downloaded from the official website.