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.
MenuBar Stats - Advanced Mac system monitor right from the menu bar
PuTTY - Popular free terminal application. Mostly used as an SSH client.