KCPUMonitor is a CPU frequency and temperaturemonitor written in C++ that resides in the KDE or GNOME system tray. It utilizes the /sys/devices/system/cpu interface to retrieve or set frequencies. It is SMP-friendly. Uses the KDE and Qt libraries.
Kooling is a kde applet for laptop showing information about the system temperature, states of the fans, etc. It also has the ability to drive fans and CPU frequency.
This applet is for now designed for Dell Inspiron 8000 series, but it may easily be ext