Stats - Simple macOS system monitor in your menu bar.
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."
eul - System & Hardware and OS & Utilities
Time Machine - Time Machine is the breakthrough automatic backup that’s built right into Mac OS X.
MenuMeters for El Capitan - MenuMeters for OS X El Capitan 10.11 (and later)