What is CoolMon?
CoolMon is a program for monitoring vital system stats and almost anything else you wish to display on the desktop. It can also display stats from remote pc's and publish real-time stats on a webpage. The application can display CPU, RAM and page file usage, hard drive usage, MotherBoard Monitor temperatures and fan speeds, various network stats and much, much more. For a full list of CoolMons abilities, see the features page. To view some of the different ways you can make CoolMon display the data, please see the screenshots page.
Some of the awards they have received are here
A interesting item is the extension section for this application [reminds me of Firefox extensions :)].
The source is available and it seems to be having a good fan following. Hey ColMon 2 is out too, though still in alpha now.