Install wmtop by entering the following commands in the terminal:
sudo apt update sudo apt install wmtop
Description:
dockapp that displays 3 top memory or CPU using processes
wmtop is a windowmaker dock app to display the top 3 processes running on a unix box displaying the cpu usage or memory usage in an attractive graphical way using little screen real estate. It's a kind of mini 'top'.
Homepage: http://windowmaker.org/dockapps/?name=wmtop
Version: 0.85-1
Section: universe/x11