InJoy Firewall 4.1
Forget about old-generation and run-off-the-mill commercial firewalls. This multilayered next-generation Firewall is the FEEL-GOOD multi-purpose product you have been looking for. It readies you for the future through cutting-edge Deep Packet Inspection, unique MULTI-PLATFORM support, and IPSec VPN support. Its unparalleled network monitoring turns you into an INSTANT SECURITY PROFESSIONAL with unique real-time insight into any network activity.

Comodo Firewall Pro 3.0.14.276
FREE Comodo Firewall Pro - Secure your system against internal attacks such as Trojan viruses / malicious software and external attacks by hackers. Safeguard your personal data through a simple user friendly single click interface offering full immunity to attack. Comodo Firewall Pro helps you connect in a secure way to the internet and global networks. Total peace of mind is FREE!!

Privatefirewall 5.0
Integrated desktop firewall and multi-layer intrusion prevention software delivers signature-less, zero-hour protection from known or new spyware, viruses, hacking techniques and other intrusions on Windows desktops and servers. Privatefirewall features port tracking, URL and packet filtering and application/system behavior modeling and anomaly detection components to deliver proactive, comprehensive protection.

ThreatSentry 3.0
ThreatSentry Host Intrusion Prevention + Application Firewall defends Windows Web servers against new and progressive attack techniques, protects network weak points, overcomes lapses in patch management, and reinforces regulatory compliance. An ISAPI filter hosted in MMC, ThreatSentry compares server requests to a knowledgebase and an evolving system baseline to detect untrusted activity and prevent attacks on Microsoft® IIS.

ServerDefender AI 1.2.0
Prevent common, dangerous Web hacker attacks (like SQL injection, buffer overflows, cross-site scripting and request forgery, directory traversal, zero-day, brute force, and denial of service attacks) with this low-cost Microsoft IIS Web application firewall. Go beyond signatures with neural learning to whitelist good traffic and block new or unknown threats with advanced multi-server installation, reporting, and alerts. Free trial with support.