fancontrol!

The Open Hardware Monitor is a free open source software that monitors temperature sensors, fan speeds, voltages, load and clock speeds of a computer.

SpeedFan is a program that monitors voltages, fan speeds and temperatures in computers with hardware monitor chips. SpeedFan can even access S.M.A.R.T. info and show hard disk temperatures. SpeedFan supports SCSI disks too.

cinnamon-cpufreq-applet - Port of Gnome 3 CPUFreq applet to Cinnamon - with some fixes.

smcFanControl is the perfect application for all those Macbook owners getting burned by their hot-running Macbook.This Mac application allows you to control the speed of the fan in your MacBook so you can avoid it running hot.

TPFanControl will reduce the fan noise of your IBM/Lenovo Thinkpad.

Personalize your experience with state-of-the-art real-time overclocking*. Used by world record setting overclockers across the globe, AMD OverDrive™ gives you unprecedented control over your processor, memory and chipset to push the performance envelope further than ever before.

EPU-6 Engine is a program for managing the power-saving profiles. A few preset profiles to choose from can be found and you can adjust the settings. You can select one of the three preset models for the CPU fan in the BIOS of Asus mainboards.The ASUS EPU provides total system power management by detecting current PC loadings and intelligently moderating power in real-time. It automatically provides the most appropriate power usage for the CPU, VGA card, hard drives, and CPU/chassis fan - helping save power and money! »

Corsair Link Dashboard software allows you to monitor your system and gives remarkable control over your case fans, lighting, and compatible Corsair power supplies and Hydro Series liquid CPU coolers that work together for optimal cooling and performance.

eeectl is a small and simple yet powerful program for overclocking and hardware control of ASUS EEE PC series. You can use it at your own risk. Please do not try to run this program on other hardware; the consequences may be terrible.