Hard Disk Space

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

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

Your Computer, as a City. Reclaim your wasted space.

Disk Utility is a system utility for performing disk and disk volume-related tasks on the macOS operating system by Apple

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

PowerMyMac is not only a Mac cleaner app to clean up Mac. It is also a useful tool to optimize and speed up your Mac. Get more free space on your Mac right now.

paid Free Trial $9.95 / Monthly (One month license for one Mac)

OmniDiskSweeper is a tool to free up the hard disk space by detecting the large files and folders.

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

Open Source

ClearDisk is an app to delete Cache, Logs, Cookies, Downloads, Trash and Language Resources on your Mac.