Network Monitor II is a freeware network monitoring application that's customizable.
Here are some screenshots to illustrate the features and user interface of this application:
Sidebar gadget that provides information at a glance about Internet signal, computer's IP addresses, the traffic speed. Screenshot of Network Monitor II - 454px · 277pxCustomizable design to suit your style. Screenshot of Network Monitor II - 130px · 274pxAnalyze network traffic and save data of interest. Screenshot of Network Monitor II - 318px · 249pxReal-time status of internet connection and related parameters. Screenshot of Network Monitor II - 219px · 249px