pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
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.
FireMon - FireMon Security Intelligence Platform delivers continuous visibility into and control over firewall infrastructure.
Windows Firewall Control - Windows Firewall Control is not the built in firewall system in the Windows operating systems.