BWMeter 4.1.4 

BWMeter is a powerful bandwidth meter and monitor which measures and displays all traffic on your network. It can analyze the data packets (where they come from, where they go, which port and protocol they use). This makes it possible to distinguish between local and internet traffic for example. It can create statistics for all computers in your network, measuring and displaying all internal network traffic as well as download and upload from the internet. You can even define filters which show your transfer with certain Internet addresses. It is ideal for home users to get an overview of how much bandwidth they use, as well as small to large businesses, where one computer can maintain the statistics of downloaded / uploaded data of all computers in the network. The product is easy to configure and offers a rich set of options and features for beginners as well as experts and network administrators.