Binary package “wmload” in ubuntu focal
system load monitor designed for Window Maker
wmload displays a graphical representation of the kernel/system
statistics on a 64x64 miniwindow. There are three shades in the
window: the light one, which corresponds to user statistics, second
is the nice time statistics, and the darkest one is system statistics.
.
It works with other window managers, there isn't anything in the program to
make it require Window Maker, except maybe the look.