With Hamachi you can organize two or more computers with an Internet connection into their own virtual network for direct secure communication. Access computers remotely, use Windows File Sharing, play LAN games, run private Web or FTP servers or communicate directly.

Hamachi is fast, secure and simple. It is also free.

* Think - LAN over the Internet.
* Think - Zero-configuration VPN.
* Think - Secure peer-to-peer.

Changelog:
- Modified the driver to work around Comodo firewall's bug of not
coping with zero-checksum'ed UDP packets

- Fixed the crash condition that occurs when starting Hamachi on
computers that have previously run 0.9.x.x versions of Hamachi

- Fixed per-peer preferences sometimes not getting properly saved
when running Hamachi as a service

- Fixed TCP peer-to-peer tunneling sometimes not working between
1.0.2.0 clients

Download : http://www.hamachi.cc/download/list.php