ZoneAlarm Free 8.0.298.0

ZoneAlarm Free Firewall blocks hackers from infiltrating your home PC by hiding your computer from unsolicited network traffic. By detecting and preventing intrusions, ZoneAlarm Free Firewall keeps your PC free from viruses that slow down performance, and spyware that steals your personal information, passwords, and financial data.

• Essential firewall protection
• Be invisible to others online
• New interface makes it even easier—smaller size keeps it light
• Systematically identifies hackers and blocks access attempts

Sygate Personal Firewall 5.6.2808 (Freeware)

Free for personal use, Sygate Personal Firewall provides best of breed security in a user friendly interface, protecting your PC from hackers, trojans and DoS attacks.

Features include full-ICS support, protocol driver level protection, enhanced logging, and more.

Sygate Personal Firewall delivers unobtrusive, highly configurable, enforceable rule-based security policy by constantly operating in the background of your PC. Policies regarding applications, trusted IP addresses, ports, protocols and scheduling can be customized to support and secure any network configurations or requirements. Designed with high performance in mind, it delivers top-notch security without sacrificing your computing power.

Note that from November 30th, 2005 all Sygate consumer firewall products have been discontinued but this versions is available here for free use.

Comodo Internet Security 3.11.108364 (Freeware)

Comodo claim that their firewall is unique in that it passes all known leak tests to ensure the integrity of data entering and exiting your system. Comodo has put firewall through all kinds of sophisticated tests to ensure its firewall powerful enough to ward off these attacks with default settings. No other firewall has had to work this hard.

• PC Magazine Online's Editor's Choice
• Secures against internal and external attacks
• Blocks internet access to malicious Trojan programs
• Safeguards your Personal data against theft
• Delivers total end-point security for
• Personal Computers and Networks

Sunbelt Personal Firewall 4.6.1861(Non-Commercial Freeware)

Protect yourself from hackers. Secure your PC with a 100% free firewall download. Sunbelt Personal Firewall (SPF), previously known as Kerio Firewall, was called "our favorite" by PC Magazine.

The Windows Firewall (both XP and Vista) is worse than useless, it gives you a false sense of security. Why? It only filters incoming traffic. That means if malware has compromised your PC, it is able to send out all your personal info. That's right; the Windows "firewall" does not stop that! But SPF...

• Supports Windows XP and Vista
• Filters both ingoing and outgoing traffic!
• Keeps hackers out and your private info inside.
• Works great with VIPRE Antivirus + Antispyware
• Easy to use and does not slow down your PC!

Outpost Firewall (Freeware)

Outpost Firewall gives peace of mind from any virtually every Internet danger. Unlike other personal firewalls, Outpost starts protecting against all kinds of internal and external attacks as soon as it's installed.

This is the first firewall with an open architecture and support for plug-ins, so its capabilities can easily be extended by thousands of developers worldwide.

Key Benefits:

• Basic Firewall Protection - Standard packet and application filtering safeguard your computer from unwanted communications.
• Connections Monitoring - Lets you see network activity in real time, to help define inappropriate connections and close them right away.
• Surfing Protection - Maintains your privacy on the Internet, keeps browser protected from Internet dangers.