Only the top rated free firewalls of 2011 are listed below, tested and recommended by TVL. Feel free to comment below if you think this page needs additions or edits.
Ashampoo FireWall Free
The Ashampoo FireWall makes it easy for anyone to set up an effective, free firewall. Its Configuration Assistant guides you through every step of the the setup process. Easy Mode makes using it a breeze. You dont need any special technical knowledge, and everything is explained clearly. Even with its additional security tools, Ashampoo Firewall is a tiny program that uses very little memory and computer resources. You get heavy-duty protection without a heavyweight load on your system. The Ashampoo FireWall user interface explains itself every step of the way. The information is right there on the screen where you need it so that most users will never need to consult the help files.
PC Tools Firewall Plus Free Edition
PC Tools Firewall Plus Free Edition is a powerful personal free firewall for Microsoft Windows that protects your computer from hackers and intruders. Firewalls control the network traffic in and out of your PC by monitoring applications that connect to the network. Firewall Plus can stop Trojans, backdoors, and keyloggers from damaging your computer and stealing your private information. PC Tools Firewall Plus is advanced technology designed specially for people, not experts. Powerful prevention against attacks and known exploits is activated by default and advanced users can also easily create their own packet filtering rules to customize the network defenses. The program is recommended for use alongside of AntiSpyware and Antivirus software like AVG or Spyware Doctor to protect PC against Spyware, hackers, worms, and viruses.
ZoneAlarm Free Firewall
ZoneAlarm is designed to protect your DSL- or cable-connected PC from hackers. This program includes four interlocking security services: a firewall, an application control, an Internet lock, and Zones. The firewall controls the door to your computer and allows only traffic you understand and initiate. The Internet lock blocks Internet traffic while your computer is unattended or while you’re not using the Internet, and it can be activated automatically with your computer’s screensaver or after a set period of inactivity. Zones monitor all activity on your computer and alert you when a new application attempts to access the Internet. Version 7.0.362 may include unspecified updates, enhancements, or bug fixes.