NordVPN - NordVPN offers VPN technology that encrypts data twice.
Tunnelblick - free software for OpenVPN on OS X and macOS
TunnelBear - Really simple VPN to browse the web privately & anonymously.
OpenVPN - OpenVPN - The Open Source VPN
WireGuard - Fast, Modern, Secure VPN Tunnel
LiquidVPN - LiquidVPN creates an encrypted tunnel between the device and the servers via a secure Virtual Private Network.