NordVPN - NordVPN offers VPN technology that encrypts data twice.
OpenVPN - OpenVPN - The Open Source VPN
TunnelBear - Really simple VPN to browse the web privately & anonymously.
SparkLabs - SparkLabs's Viscosity is the OpenVPN client that lets you secure the network.
Spotflux - Spotflux is a free VPN that protects your privacy online for all your internet devices.
Cloak VPN - Stay safe online when using untrusted networks