MenuMeters for El Capitan - MenuMeters for OS X El Capitan 10.11 (and later)
Drive Manager - Drive Manager has been written to help you easily identify drives which are of the same type.
iStat Menus - "An advanced Mac system monitor for your menubar."
Stats - Simple macOS system monitor in your menu bar.
Time Machine - Time Machine is the breakthrough automatic backup that’s built right into Mac OS X.
Hardware Lister - lshw (Hardware Lister) is a small tool to provide detailed information on the hardware...