CoolMon is a freeware program for monitoring vital system stats or displaying (almost) anything else you may wish to display directly on your desktop. The application can display CPU, RAM and page file usage, hard drive usage, system temperatures and fan speeds, various network stats like download speed and much, much more. You can choose between showing the data as graphs, numbers, pie charts, bars etc. Pictures from the web, clocks, RSS feeds, calendars and much much more can all also be added with plugins. It can also display and send stats to/from remote pc's and can publish real-time stats on a webpage.
A brand new WYSIWYG editor ("Outlaw Ed") has now been added which makes configuration real easy. You can choose between an online or offline installer.