Free Firewall

SensiveGuard v1.06
http://www.sensiveguard.com

ZoneAlarm v6.0
http://www.zonelabs.com/store/content/home.jsp

Jetico Personal Firewall v1.0.1.61
http://www.jetico.com

SoftPerfect Personal Firewall v1.4.1
http://www.softperfect.com

NetVeda Safety.Net v3.61
http://www.netveda.com/consumer/safetynet.html

R-Firewall v1.0
http://www.r-tt.com

Sygate Personal Firewall v5.6
http://www.symantecstore.com

Filseclab Personal Firewall v2.5
http://www.filseclab.com/eng