Binary package “wmdiskmon” in ubuntu disco

dockapp to display disk usage

 wmdiskmon is a dockapp to monitor disk usage. It can be used with X window
 managers like Window Maker, AfterStep, BlackBox and Enlightenment.
 .
 The dockapp has two modes. The default displays three devices at a time
 in a bargraph manner. The other displays only one device, but with
 numeric percentage and a longer name over three lines.