WireGuard - Fast, Modern, Secure VPN Tunnel
ProtonVPN - ProtonVPN is a security focused FREE VPN service, developed by CERN and MIT scientists. Use the web anonymously, unblock websites & encrypt your connection.
OpenVPN - OpenVPN - The Open Source VPN
Tunnelblick - free software for OpenVPN on OS X and macOS
TunnelBear - Really simple VPN to browse the web privately & anonymously.
Cisco Anyconnect Secure Mobility Client - Get much more than industry-leading VPN client connectivity. Cisco AnyConnect protects your enterprise resources through a single agent. See how.