root-cpu
Display the cpu usage on your X11 root window with a transparent background. It has serveral commandline options to change the output to you own preferences.
Should you happen to find any bugs please fix them and send me a diff. Or you could just tell me what is wrong, and i'll try to fix it myself.
NOTE From version 0.2.0 onwards, there is no more text support. You can only display a bar.
Screenshot
Version 0.2.0

Version 0.0.2

Version 0.0.1

Download
Current release (0.0.3).
Older version
Older versions can be found here.