Sensorsview is a temperature and system monitor that displays the information in the notification area of the taskbar. It is motherboard dependant so check the read me for compatibility but it covers most of the popular ones from what I can gather.
It measures:-
CPU temp
HD Temp
Case temp
Fan speeds
Voltages

http://www.majorgeeks.com/SensorsView_d4859.html

Install as usual, copy the folder to another location minus the uninstall.exe then uninstall the original. Space is an issue for me so I have also been able to delete the folder 'drv' from the install and the program still runs taking up a little over 300kb

NB This is a freeware versions but there is also a Pro version for $19.95

Nice app, but it writes "giveio.sys" to C:\WINDOWS\SYSTEM32\DRIVERS during installation.

Next Sensor is another app that does the same thing from an executable file so it definitely is no install.

http://cbid.amdclub.ru/

Tried running V1.10 on my Dell machine and got this error: