Today proXPN re-launched its site and software to provide free, unlimited 512-bit encryption for all users. Available for both Windows and Mac, proXPN utilizes the OpenVPN protocol to establish a 512-bit encryption tunnel using a 2048-bit key.
proXPN is a personal virtual private network that provides users with privacy and safety while using the internet. proXPN encrypts all data passing between your computer and our servers, including everything over Wi-Fi and even through your ISP. This offers dramatically improved protection from Wi-Fi snooping.
Completely free of charge with unlimited data downloads and uploads, proXPN also offers optional paid subscriptions with more advanced features, such as support for mobile devices and access to the VPN’s server locations worldwide. Read the Full Story.
I am using Hotspot Shield Free VPN. However free version is ad supported, but its good from all other available free vpn’s. You can surf anonymously and access all blocked websites using HSS.
Check it out here: http://www.hotspotshield.com