Fbpanel is a lightweight desktop panel that works with any
NETWM (http://www.freedesktop.org/) compliant window manager.
It features:
  o taskbar      - show list of open windows
  o pager        - thumbnailed view of the desktop(s)
  o launchbar    - buttons to launch applications
  o show desktop - button to iconify or shade all windows 
  o image        - display an image
  o clock        - show the current time and/or date
  o system tray  - tray for XEMBED icons (aka docklets)
  o cpu monitor
  o network monitor
  o memory monitor
  o battery monitor
  o volume control
  o general monitor - display output of configured command in a panel

WWW: http://fbpanel.sourceforge.net/