Free Disk Space Monitor Alternatives

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.

Manage ZFS volumes in the menu bar

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Drive Manager has been written to help you easily identify drives which are of the same type.

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

Open Source

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

htop - an interactive process viewer for Unix. This is htop, an interactive process viewer for Unix systems. It is a text-mode application (for console or X terminals) and requires ncurses. Latest release: htop 2.

TreeSize tells you where precious disk space has gone to.

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.

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

GKrellM is a single process stack of system monitors which supports applying themes to match its...

Simple macOS system monitor in your menu bar.

Open Source

Rainmeter is a desktop customization platform.

Open Source

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