PStateMenu is a Menulet for Mac OS X which controls VoodooPState.kext and is intended to replace PStateChanger.

With this Menulet you get nearly the power management features which the Linux kernel offers.

It comes with On Demand and Conservative governors, which control your CPU according to it’s load. The governors are based on the theory behind cpufreq, and provide more or less a full implementation of the prefered way to control Enhanced SpeedStep.