App to monitor broadband

[j26]

I'm considering getting a 3G Broadband modem (works wherever you get 3G signal). It has a monthly cap of 5gig p/m, so I was wondering if anyone knows of an app that will allow me to monitor how much I've used over a month so I don't go over.

I'm thinking of getting rid of my home broadband for the next year or so to offset the cost of the 3G broadband, as I will be travelling a LOT (1,000 miles a week). Because I won't have home broadband, usage on the mobile platform will be an issue. Once I finish, I can go back to home based, but for the moment mobile will suit me better.

Thanks for any advice you might have.

 

[netdog]

Menu Meters

 

[j26]

Menu Meters

Thanks, but I was hoping for something that will tell me I've used x gigs in the past month on a certain connection. That has a monitor, but it looks like I'd need to restart to reset it. Is there anything I can reset at will?