Comodo firewall

Homepage: http://www.personalfirewall.comodo.com/

Download link: http://www.personalfirewall.comodo.com/download_firewall.html

Operating Systems: Windows XP, Vista

Description: Complete firewall with many features and strong intrusion detection. Suports ICS. It is now part of Comodo Internet Security. You can still install only the firewall.

Jetico Personal Firewall

Homepage: http://www.jetico.com/jpfirewall.htm

Download link: http://www.jetico.com/jpfirewall.htm

Operating Systems: Windows 98, Nt, Me, 2000, XP

Description: Firewall

Online Armor Personal Firewall

Homepage: http://www.tallemu.com/free-firewall-protection-software.html

Download link: http://www.download.com/Online-Armor/3000-10435_4-10426782.html?tag=lst-1&cdlPid=10893859

Operating Systems: Windows Nt, 2000, XP

Description:Firewall

Smothwall Express Firewall

Homepage: http://www.smoothwall.org/

Download link: http://www.smoothwall.org/get/index.php

Operating Systems: All (Smoothwall is an operating system)

Description: A different kind of firewall. We use an old pc and install smoothwall express from cd.(all hard disk data will be erased) Then we install our internet connection (modem ή router)  on that pc and set this pc as gateway to all other pc’s on our network. Supports  unlimited local ip adresses, port forwarding, ip block list, PPP, PPPoA, PPPoE,web proxy, pop3 proxy, voip proxy, im proxy.