VPNTraffic offers a basic and inexpensive VPN services to a large number of geographical locations. Protocols are limited but countries are not . Read our review for more details.
PrivateTunnel offers a metered VPN service that uses OpenVPN only. Instead of monthly fees you would pay per GB downloaded. PrivateTunnel is developed by the same company that developed the popular open source OpenVPN protocol.
CactusVPN is a new VPN service provider as of 2012 based in Moldova offering a VPN locations in the US, UK and the Netherlands. Read here to see how CatcusVPN stacks up against the competition.