TCPView - TCPView is a Windows program that will show you detailed listings of all TCP and UDP endpoints on...
Port Map - TheCodingMonkeys, authors of software like SubEthaEdit.
CurrPorts - CurrPorts displays the list of all currently opened TCP/IP and UDP ports on your local computer.
PortMapper - Do you need to map a specific TCP or UDP port on your machine to another port on another machine?
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
Simple Port Forwarding - Simple Port Forwarding works with WebPages and not directly with your router.