NetWorx is a simple, yet powerful, tool that helps you objectively evaluate
your bandwidth situation. The program's main purpose is to gather bandwidth
usage information and to measure the current or the average speed of your
Internet connection. NetWorx can help you identify possible sources of
network problems, ensure that you don't exceed the bandwidth limits specified
by your ISP, or track down suspicious network activity characteristic of
Trojan horses and hacker attacks. (in Internet)