See a demo of how you can monitor your speed remotely over the internet via an ordinary web browser
Using the Alerts feature, BitMeter can notify you when you have uploaded/downloaded a certain amount, or if your speed goes above or below any limit that you specify.
Does your ISP restrict how much you can download each month? Maybe the ISP Restrictions screen would be useful, just enter details of your monthly quota, and BitMeter will warn you when you approach your limit.