NetTraffic v1.8 - This free program plots in realtime all data sent and received via all your TCP/IP Network adaptors. Shows separate sent, received, send rate, received rate, peaks and totals. Five graphs and statistics. Animated System Tray Icon. Highly customisable - colours, graph size, plot lines, sample rate, 3D graph, axis, fonts, backgrounds.
Plots dial-up modem data.
Orion Network Performance Monitor
Network Equipment Performance Monitor
Monitors network traffic to and from your pc
Packet analyzer and protocol decoder