AVG for me.
Agnitum Outpost
BitDefender
BlackICE PC Protection
eTrust EZ
F-Secure
Kaspersky
McAfee
Norman
Norton
Panda
Sunbelt Kerio
Sygate
Nod 32
ZoneAlarm
Windows XP Firewall (only)
Windows Vista Firewall (only)
One that is not listed here
AVG for me.
my vote goes to comodo. best firewall i have ever used.
Norman Security Suite is best
Zone alarm was the best now i tell u take KIS 2010 !! russian never fail ;)
After a year and half in this thread, KIS is still the best and friendly program to use on our PC, i still have it.
+1 with matrix631
We believe in Russians, till now they're the best!
ScreenOS, I have an SSG5 with wireless at home, and also IPTABLES
iptables for linux
IPFW for FreeBSD
I use Comodo free firewall and having used it for over a year would be happy to recommend to other members, this and avast have kept the nasties at bay.