Oast - OAST is a cross-platform front-end (GUI) for OpenVPN-client, allowing to manage multiple.
Tunnelblick - free software for OpenVPN on OS X and macOS
OpenVPN Manager - OpenVPN Manager is a tool which controls OpenVPN.
OpenVPN - OpenVPN - The Open Source VPN
Tor Browser - Tor is free software for enabling anonymous communication.
WireGuard - Fast, Modern, Secure VPN Tunnel