Is there any network monitor software with a notification area icon?

I often use my laptop in the subway / office buildings where internet connection may be laggy / absent for some period of time. Is there any network monitorying software that can constantly monitor my network connection quality (for example, by sending ping to google.com every few second) and display a green-yellow-red icon in the notification area so I will know if i have a normal internet connection or not?

Google search doesn't show any such software :(

Solution 1:

Try PingMenu: https://github.com/kalleboo/PingMenu

Solution 2:

One solution is to use GeekTool. You'll need to write a small shell script, which would be a separate question.

Solution 3:

Try http://www.ragingmenace.com/software/menumeters/