WireGuard - Fast, Modern, Secure VPN Tunnel
Hamachi - Hamachi is a VPN service scaled to the unique needs of business owners.
Pritunl - Pritunl is an open-source enterprise distributed OpenVPN and IPsec server.
ZeroTier - Extremely simple P2P Encrypted VPN
OpenVPN - OpenVPN - The Open Source VPN
Tunnelblick - free software for OpenVPN on OS X and macOS