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.

Gdu - Gdu is one of the smart open-source disk analyzers specially designed for Linux that provides you complete information related to the disk space.

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.

Baobab Disk Usage Analyzer - Baobab Disk Usage Analyzer is one of the light-weight disk analyzers that offers you a chance to view and monitor the disk usage & folder structure without any hassle.