CPU frequency plugin for GKrellM

 gkrellm-cpufreq is an additional plugin for GKrellM that allows one
 to view and set the CPU clock frequency. It also displays the currently
 active CPU gouverner which has been set for cpufreq such as on-demand,
 performance and powersave. The plugin is very useful when using
 tiling window managers such as awesome together with GKrellM.