Tunngle is a zero-configuration peer-to-peer (P2P) virtual private network (VPN) client with built-in instant messenger and network browser. The application is capable of establishing connections between computers that are behind NAT firewalls to create a Virtual IPv4 Network that can then be used to run IPv4 enabled applications.

“Tunngle is a revolutionary p2p VPN tool that delivers the best online entertainment experience. Tunngle is specifically designed to allow PC gamers all over the world to comfortably play their games over the Internet while enjoying all the commodities of a Local Area Network party. Tunngle is literally built around games. Each game has its own public network. Each network comes with its own chat. You can bookmark, list and search.”