wmpower+ is Window Maker laptop power management dockable application. It displays the battery status, the number of fans or the fan speed, and CPU temperature, and allows you to switch the power management status of some laptops. It is based on wmpower by Michele Noberasco, which doesn't work with the new kernels starting from 2.6.36.
wmsupermon is a universal monitoring dockapp. It can be used to monitor CPU usage, disk I/O, memory usage, swap, filesystems, space utilization, network traffic, wireless link quality, CPU frequency, CPU temperature, fan speed, voltages (without requiring lm_sensors), battery status (with actual, not "reported", discharge rate), traffic from your router, or anything else. It can open and maintain many dockapp windows with one dockapp process.