Dropbear SSH Server and Client - Dropbear is a relatively small SSH 2 server and client.
socat - socat is a relay for bidirectional data transfer between two independent data channels.
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.
Komodia Relay - Free open source tool to perform TCP based session relay
Ethereal - Ethereal® is used by network professionals around the world for troubleshooting, analysis...
Simple Port Forwarding - Simple Port Forwarding works with WebPages and not directly with your router.