PortMapper - Do you need to map a specific TCP or UDP port on your machine to another port on another machine?
TCPView - TCPView is a Windows program that will show you detailed listings of all TCP and UDP endpoints on...
Komodia Relay - Free open source tool to perform TCP based session relay
CurrPorts - CurrPorts displays the list of all currently opened TCP/IP and UDP ports on your local computer.
Simple Port Forwarding - Simple Port Forwarding works with WebPages and not directly with your router.
Proc Net Monitor - SecurityXploded is an Infosec Research Organization offering 200+ FREE Security/Password Recovery Tools, latest Research Articles and FREE Training on Reversing/Malware Analysis