GO Simple Tunnel, a simple tunnel written in golang
glider is a forward proxy with multiple protocols support
Manage port forwardings via UPnP
A TCP/UDP packet forwarding tool for IPv6 and IPv4
supports https and http protocol proxy;
Simple software for port forwarding and routing w/o a hardware router
Java SSH API
Port forwarding between TCP and UDP
WiFi Hot Spot using WindowsXP, Windows 7 and 2008 R2
Lomalarga is a VPN-like service based on SSH and Linux.
HardWall Firewall for Linux 2.4/2.6