Notebook Hardware Control!

CrystalCPUID is a CPU utility software.

RightMark CPU Clock Utility (RMClock) is a small GUI application designed for real-time CPU frequency, throttling and load level monitoring and on-the-fly adjustment of the CPU performance level on supported CPU models via processors power management model-specific registers (MSRs). In automatic management mode it continuously monitors the CPU usage level and dynamically adjusts the CPU frequency, throttle and/or voltage level as needed, realizing the "Performance on Demand" concept. Notice: RMClock is different than CPU RM, those are two very different pieces of software designed to do different things. »

K10stat is a undervolting utility for K10 AMD processors only.

Processor Hardware Control is a project to allow CPU voltage/frequency changing from userspace.

CPUMSR controls frequency, voltage and multiplier settings of supported CPUs.