socat - socat is a relay for bidirectional data transfer between two independent data channels.
TCPView - TCPView is a Windows program that will show you detailed listings of all TCP and UDP endpoints on...
PortMapper - Do you need to map a specific TCP or UDP port on your machine to another port on another machine?
CurrPorts - CurrPorts displays the list of all currently opened TCP/IP and UDP ports on your local computer.
Portfwd - Portfwd, Port Forwarding Daemon, stands for port forwarding daemon.
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