SensorsView Pro

SensorsView is a utility, that monitors the temperature of your CPU, northbridge, motherboard, VGA and hard disks, as well as voltages and fan speeds (as supported by your motherboard). It can alert you if the values reach a critical level, and also provide a complete overview of the measurements.

In addition, the program shows usage of CPU, physical memory, HDD, NIC (Network Inerface Connection).