Vtunnel allows you to access websites blocked by your school, employer, or ISP, or are otherwise unavailable from your current internet connection. As compared to most free proxies, Vtunnel allows the "form post" method, which means you can use it to login to most websites such as gmail, YouTube or myspace, which is impossible from most free proxies. Vtunnel also allows file downloads and no restrictions and limitations on features, which is not common for a free proxy service. To be less blockable and for optimum
security, Vtunnel now fully supports SSL via https://www.vtunnel.com
This should provide more anonymity, more security, and (the main reason I'm using it) greater unblockability. A friend of mine got his SSL certificates at godaddy, and the secure portion of vtunnel is on its own dedicated server.