Gbridge is a free software for Windows XP and Vista that forms a secure VPN tunnel between multiple computers and provides chat, remote desktop access and control, automatic files and folders sychronization and backup over the internet, behind a firewall.

Key features of GBridge for Windows include:

SecureShare: Securely share files between your own computers to remotely access files over internet. You can also choose to share files with friends and familiy who can instantly preview them without needing to download them locally.

AutoSync: Synchronize files folders from/to any machine on your trusted VPN network. Supports Auto schedule, auto resume, incremental without any size limit

EasyBackup: Setup auto-recurring local or remote backup of important files and folders

DesktopShare: Using VNC, you can access your PC’s desktop screen remotely or share it with your friends from anywhere, even behind a NAT’d firewall.

GBridge leverages on Google’s infrastructure by using a GMail account to authenticate and authorize access to your VPN network.