PortMapper - Do you need to map a specific TCP or UDP port on your machine to another port on another machine?
NetLimiter - NetLimiter is an ultimate Internet traffic control and monitoring tool designed for Windows.
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.
Komodia Relay - Free open source tool to perform TCP based session relay
NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar