Monitor Your Bandwidth
BitMeter is a small bandwidth-monitoring application packed with features to help you track and analyse your bandwidth usage and avoid end-of-month shaping or excess bills. On top of the basic features like a real time usage meter, BitMeter allows you to set BitMeter to alert you when you've reached a user specified percentage of your bandwidth allotment.
Networx offers network Statistics, Incoming Traffic, and Speed Meter readouts. It also includes traceroute, netstat, and a ping module to help you keep an eye on your network.