Tunnello VPN is a special add-on for Google Chrome that allows users to easily unblock websites that have been restricted by companies or other administrators for any reason. The tool also helps to make sure that users are able to surf the net anonymously. However, while Tunnello is free to download and use, it should be noted that only the first gigabyte of data is provided free of charge per month and those who exceed this could find themselves faced with a hefty bill at the end of the month.