If you have an ASUS board go to http://usa.asus.com and find their ASUS Probe program. It monitors your CPU temperature, CPU fan speed, voltage, RAM temperature, and some other goodies.
Try seraching at http://www.download.com . They have so many programs it's crazy. Not to mention 8 out of 10 of the programs they have are free. So try searching there and see what you can find.