powernowd 0.96-2ubuntu1 (amd64 binary) in ubuntu dapper

control cpu speed and voltage using 2.6 kernel interface
 This simple client controls CPU speed and voltage using the sysfs interface
 to the CPUFreq driver in v2.6 Linux kernels. It does not depend on APM or
 ACPI, and it doesn't try to do anything other than control the CPU.
 .
 The name is somewhat misleading, as any CPUfreq capable processor will work,
 not just those from AMD. However, it works better on CPUs that support more
 than two speed steps, like those with AMD's PowerNow! or Intel's Pentium M
 series.
 .
 This daemon is less complicated than cpufreqd or cpudyn, at the cost of
 absolutely depending on a 2.6 kernel with the userspace governor and sysfs
 support enabled.