OpenConnect - VPN client compatible with Cisco AnyConnect SSL VPN
OpenVPN - OpenVPN - The Open Source VPN
WireGuard - Fast, Modern, Secure VPN Tunnel
ZeroTier - Extremely simple P2P Encrypted VPN
OpenConnect GUI - This is the GUI client for the OpenConnect VPN, an open-source alternative to Cisco AnyConnect.
Hamachi - Hamachi is a VPN service scaled to the unique needs of business owners.