WinDirStat Alternatives

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.

TreeSize tells you where precious disk space has gone to.

Auto arrange all your app windows, whether on one screen or many with a single click!

Try for free freemium $39.99 / Annually (One PC, One Year)

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

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

Distributor of workload automation, financial statement reporting, data access, IT Asset Management and Service Desk software solutions.

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

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.

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.

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

Open Source

JDiskReport enables you to understand how much space the files and directories consume on your disk...

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

Disk Inventory X is an open source disk space analyzer and disk management tool for the Mac OS X operating systems that allow the OS X users to check for the availability of free space in their machines.

free

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