Wmmemmon is a program to monitor memory/swap usages. it is a dockapp that is supported by x window managers such as window maker, afterstep, blackbox, and enlightenment.

the current memory usage is displaied as the outside pie-slices. the swap usage is represented by the inside slices. it has an lcd look-alike user interface. the back-light may be turned on/off by clicking the mouse button over the appliacation. if the usage hits a certain threshold, an alarm-mode will alert you by turning back-light on.