Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
TrafficMonitor - TrafficMonitor is a network monitoring suspension window software in Windows.
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
NetTraffic - Essential network bandwidth monitor.
netcat - Netcat is a featured networking utility which reads and writes data across network connections...
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.