ncdu - A disk usage analyzer with an ncurses interface, aimed to be run on a remote server where you...
SequoiaView - SequoiaView is a featured rich application that comes with the visualization technique to provide you a single view of files and documents that are stored in your hard drive.
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
DiskBoss - A file manager with a focus on storage side of things: Monitoring, classing, storage, duplicate...
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.