Space Radar Alternatives

WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.

Open Source

WizTree quickly finds the files and folders using the most space on your hard drive. It scans the MFT (Master File Table) instead of crawling the entire disk which makes it very fast.

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TreeSize tells you where precious disk space has gone to.

Baobab Disk Usage Analyzer is one of the light-weight disk analyzers that offers you a chance to view and monitor the disk usage & folder structure without any hassle.

DiskUsage provides a way to find out which files and directories on the SD card of your Android...

DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.

paid Free Trial $9.99 / One-off

GrandPerspective is a small utility application for Mac that graphically shows the disk usage...

Discover what files are taking up your hard disks.

Filelight is an application to visualize the disk usage on your computer.

A disk usage analyzer with an ncurses interface, aimed to be run on a remote server where you...

Open Source

SpaceMonger helps you understand what's occupying your hard drive and more effectively clean it up without worrying about losing anything important in the process.

SpaceSniffer is a freeWare (donations are welcome) and portable tool application that lets you understand how folders and files are structured on your disks.

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paid