Alternatives to O&O DiskStat for all platforms with any license

WinDirStat

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

Free Open Source Windows
Disk usage statistics Display files size Hierarchical structure Multiple languages ... Portable Tree view Add a feature

897 Like
SpaceSniffer

SpaceSniffer is a tool application that gives you an idea of how folders and files are structured on your disks. By using a Treemap visualization layout, you have...

Free Windows
Hierarchical heatmaps Portable Real time display Visual Tagging Add a feature

287 Like
WizTree

Identify the data vacuums on your hard drive with pinpoint precision very, very quickly.

Free Windows
Display files size Facebook Login Fast loading time File management ... HDD Visualization Support for Large File One Time Passwords Portable Tree map Add a feature

89 Like
Baobab

Baobab Disk Usage Analyzer is a graphical, menu-driven application to analyse disk usage on Linux. Disk Usage Analyzer can easily scan either the whole filesystem tree...

Free Open Source Linux BSD FreeBSD GNOME Homebrew
No features added Add a feature

166 Like
DaisyDisk

With DaisyDisk you can free up disk space by quickly finding and deleting big, useless files. The program scans any mounted disk and displays it on the sunburst map...

Commercial Mac
No features added Add a feature

94 Like
DiskUsage

DiskUsage provides a way to find out which files and directories on the SD card of your Android phone are consuming the most space. It displays diagram with...

Free Open Source Android Android Tablet
Folder Hierarchy Add a feature

51 Like
GrandPerspective

GrandPerspective is a small utility application for Mac that graphically shows the disk usage within a file system. It can help you to manage your disk, as you can...

Free Personal $ $ $ Open Source Mac
2D graphical representation of folders Lightweight Add a feature

70 Like
Scanner

This tool uses a sunburst chart to display the usage of your hard disk or other media. The chart shows all major files and folders from all directory levels at once.
- Discontinued The program seems to be no longer updated. Last version, 2.13, released in July 2012, is fully working and can be still downloaded from the official website.
Free Windows
HDD Visualization Add a feature

51 Like
FolderSizes

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...

Commercial Windows
Reporting Add a feature

18 Like
K4DirStat

K4DirStat, fork of KDirStat , is a small utility program that sums up disk usage for directory trees, very much like the Unix...

Free Open Source Linux KDE
No features added Add a feature

10 Like
SpaceMonger

SpaceMonger is a treemapping tool for hard disks and file systems. Scan, map and manage PC, network and cloud storage Copy, move and delete files to free...

Commercial $ $ $ Windows
No features added Add a feature

43 Like
RidNacs

RidNacs is a very fast disk space usage analyzer for Microsoft Windows. It scans your local drives, network drives or single directories and produces a tree view with a...

Free Windows
Save results Add a feature

12 Like
SpaceObServer

SpaceObServer is a powerful and flexible hard disk space manager for Windows. It scans local and network drives using a background service and stores their structure...

Commercial Windows
Historical charts Database SSH Add a feature

7 Like
GD Map

GdMap is a tool which allows to visualize disk space. Ever wondered why your hard disk is full or what directory and files take up most of the space? With GdMap these...

Free Open Source Linux
No features added Add a feature

18 Like
HDGraph

HDGraph helps you to free disk space : it finds for you the largest folders on your drive. Its a free tool allowing to graphically display the hard disk space usage...
- Discontinued From their website, the last download is: HDGraph 1.5.1 (11/08/2015)
Free Windows
Sunburst chart Add a feature

9 Like