WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
ncdu - A disk usage analyzer with an ncurses interface, aimed to be run on a remote server where you...
GrandPerspective - GrandPerspective is a small utility application for Mac that graphically shows the disk usage...
DaisyDisk - DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.
Filelight - Filelight is an application to visualize the disk usage on your computer.
DiskWave - DiskWave is a free utility to help you determine where most of your hard drive space is consumed.