DiskBoss - A file manager with a focus on storage side of things: Monitoring, classing, storage, duplicate...
ncdu - A disk usage analyzer with an ncurses interface, aimed to be run on a remote server where you...
DiskWave - DiskWave is a free utility to help you determine where most of your hard drive space is consumed.
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
DiskSavvy - DiskSavvy is a free, fast and easy-to-use disk space analyzer utility allowing one to analyze disk...
Filelight - Filelight is an application to visualize the disk usage on your computer.