Software that switches location or change proxy quickly

Hi there,

I am living on campus that is a bit weird. Doing certain stuff will require proxy and doing others will not. Therefore I have to change the proxy quite often and navigating to System Preferences and then Network and then changing the location (so that it switches on the proxy) is a bit annoying.

Is there an application that will let me do this from the menu bar at the top? So that I can switch back and forth between two locations (or turning the system wide proxy on and off) with a click or two?

Thanks a lot.