Pywmseti is a dockapp that monitors your SETI@home progress. It displays how many workunits you have done and the progress on the current one. You can start and stop the current process by clicking anywhere within the window.
Cdmon is a daemon that monitors plugs of CD medias. When a CD is detected, devmon mounts it and start a dockapp that allows to launch your favorite filemanager (left click) or unmount the device (right click).
Temperature.app is a Window Maker applet which fetches local temperature information every 15 minutes from http://weather.noaa.gov and displays it (in Celsius or Fahrenheit).