TinyWall - Lightweight and non-intrusive firewall
F5 Advanced Firewall Manager - Stop even the most massive and complex DDoS attacks with BIG-IP Advanced Firewall Manager: advanced data center protection against layer 3–4 threats.
Emsisoft Online Armor Firewall - Emsisoft Online Armor Firewall is a freemium online firewall protection system by the Emsisoft that is based on the own independent protection technology of the Emsisoft.
SRX firewalls - Protect your small branch office, midsize enterprise, large data center, or cloud applications with Juniper next-generation firewalls and virtual firewalls.
Windows Firewall Control - Windows Firewall Control is not the built in firewall system in the Windows operating systems.
TrusGuard - TrusGuard is an intelligent network firewall security platform or service that helps businesses protect their networks from attacks.