ProtonVPN - ProtonVPN is a security focused FREE VPN service, developed by CERN and MIT scientists. Use the web anonymously, unblock websites & encrypt your connection.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Shadowsocks - A fast tunnel proxy that helps you bypass firewalls
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
OpenVPN - OpenVPN - The Open Source VPN
iTerm2 - A terminal emulator for macOS that does amazing things.