What free firewall download would you recommend?

Linux is a great firewall.

well for windows use:

The Award-Winning Comodo Firewall
* Award-winning PC security software
* Proactive malware defense
* Complete protection from Hackers, Spyware, Trojans and Identity theft
* Host Intrusion Prevention System stops malware from being installed [NEW]
* Clean PC Mode registers your current applications then will allow only applications that you approve to be installed on your computer [NEW]


COMODO CPF
Comodo Firewall
Free lifetime license

Comodo Firewall, rated by PC Magazine Online as an Editor's Choice, constantly monitors and defends your PC from internet attacks. It's easy to install and use and passes the industry's most stringent firewall "leak" tests. Unlike some other 'free' firewalls, this is not a stripped down version but is the full, completely functional product. This free solution comes complete with continual updates that are free forever!

here is download link
http://www.personalfirewall.comodo.com/download_firewall.html

I use Sygate's old software known as" Sygate Personal Firewall" known commonly as "spf". Google search for a download site. Its old software, that doesn't require constant updating. It is available on the 'net, however it is no longer supported by Sygate.
Works great.

Zone alarm it is very user friendly.

on first comodo second zonealrm.

Comodo Firewall Pro^^
remember to disable McAfee Personal Firewall

norton