Using its concise and visually pleasing graphical user interface, iPulse displays a multitude of information on the desktop or in the dock. The entire UI is completely configurable so you can turn off gauges you don’t want, leaving only what you are interested in for easy viewing.
– CPU activity (single and dual)
– System load
– Network activity
– Memory activity and usage
– Disk usage
– Current time and date
More info and download link here.