TinyWall - Lightweight and non-intrusive firewall
ProtonVPN - ProtonVPN is a security focused FREE VPN service, developed by CERN and MIT scientists. Use the web anonymously, unblock websites & encrypt your connection.
SonicWall - SonicWall security solutions protects your network, systems, users and data from cyber threats.
OpenVPN - OpenVPN - The Open Source VPN
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
TunnelBear - Really simple VPN to browse the web privately & anonymously.