If you are not using an unlimited broadband connection, it is better to keep an eye on your usage as it might end up with high costs. NetMeter is a freeware tool which can monitor your network broadband. The utility sits in the system tray and monitors your usage. You can monitor your daily usage as well as for the month. You can also set the limit for usage and beyond this, the application notifies you so that you are billed beyond your free usage.
The reports option shows the totals for the month, week and the day. You can get the daily, weekly and monthly reports from the respective tabs as well.
Apart from this you can also configure which all networks to monitor, notification styles and other settings.
NetMeter is a very useful tool to control your broadband usage without any manual intervention.