Real Temp - Real Temp is a temperature monitoring program designed for all Intel single Core, Dual Core, Quad...
NZXT CAM - CAM is a piece of software that was designed by NZXT, one of the industry leaders in the world of gaming PC production.
Venmon - Compact size system resources monitoring utility and multi-ping tool for Windows
SpeedFan - Hardware monitor for Windows that can access digital temperature sensors located on several 2-wire SMBus Serial Bus. Can access voltages and fan speeds and control fan speeds. Includes technical articles and docs.
Moo0 System Monitor - Lets you keep your eye on system resource usages of your PC.
Rainmeter - Rainmeter is a desktop customization platform.