Wmpopup is a Window Maker dockapp that allows you to send and receive messages to/from a Windows network over samba, such as "winpopup" or "net send" for Windows or "Linpopup" for linux.
wmisdnmon logs the 5 latest calls for your ISDN line. You can click in a number logged to see details about calls. It use the isdninfo daemon distributed with kisdnmon (a similar application for kde). wmisdnmon don't use the 14lmon daemon (you can disable it).
Pywmsysmon is a dockapp that displays your current CPU and memory usage. It has a graph displaying the history of the CPU usage and a bar to display the current amount of memory in use.
wmbp6 is a DockApp monitoring sensors (temperatures and fans speed) of an Abit BP6 mother board. It use lm_sensors 2.3.0 or newer (untested). Double-click on wmbp6 launch BP6mon, a more detailed monitor.
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).