Space Radar is a disk and memory space visualization app built with Electron and D3.js. It currently supports Sunburst, Treemap, and Flamegraph charts and is available for Mac and Windows.

Analyze Mac storage & claim more space.

A disk usage free utility for Linux.

FolderSizes provides an engaging, interactive disk space analysis experience that you must try yourself to truly appreciate. More than just a series of diverse reports, FolderSizes allows you to visualize your disk space usage from multiple perspectives, like SequoiaView.

Folder Size analyzes your hard drives and displays file and folder sizes so that you can easily check the distribution of your disk space. The application will display the sizes of the folders and files and also the percentage of the total disk size that they occupy in a bar...

Create a visual representation of the amount of space each file is taking on your hard drive. It creates a "squarified treemap" that makes it easy to see where all your space is going.

Free open-source cross-platform file & directory statistics as found on Github

i.Disk scans directory trees and displays the total space used by each directory in an easy to use form.

DiskWave is a free utility to help you determine where most of your hard drive space is consumed.

MeinPlatz "My-Place" offers an easy and fast way to scan the hard disk for lost disk space. With analysis on a percentage basis and grouping by folders, file types, size or date. It has also a nice print and export function.

DiskSavvy is a free, fast and easy-to-use disk space analyzer utility allowing one to analyze disk usage in one or more disks, directories, network shares and/or NAS storage devices.

K4DirStat, fork of KDirStat , is a small utility program that sums up disk usage for directory trees, very much like the Unix 'du' command. It displays the disk space used up by a directory tree, both numerically and graphically.