Yet another pretty nice WindowMaker dockapp.
wmifs is short for "Window Maker Interface Statistics".
Basically, it looks very much like wmppp, in that it has blinking lights that blink when data goes in or out, and a stripchart graph that shows how much data has flown through the network interface. You can choose which network interface to monitor by clicking on the interface's name.
Very good if you just want to see the network load, it won't make coffee...