htop - htop - an interactive process viewer for Unix. This is htop, an interactive process viewer for Unix systems. It is a text-mode application (for console or X terminals) and requires ncurses. Latest release: htop 2.
SpaceMonger - SpaceMonger helps you understand what's occupying your hard drive and more effectively clean it up without worrying about losing anything important in the process.
Tron Script - Tron is a glorified collection of batch files that automate the process of cleaning up Windows systems.
Drive Manager - Drive Manager has been written to help you easily identify drives which are of the same type.
Stats - Simple macOS system monitor in your menu bar.
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.