vpnbook.com is one of the well-known free VPN services that’s been around for a year now, and it stands out even against some paid VPN services in terms of speed and reliability. (You may want to check our review of VPNBook, made some months ago)
FrootVPN Review
FrootVPN is a free VPN service recommended by/advertised on Pirate Bay. Unlike other free VPNs it is not supported by advertising or donations.