Good freeware firewall

[pro2a]

Whats a good freeware firewall? I'm looking for something that doesn't run a lot of memory but is solid. None of that trial stuff either. I'm cheap. I like programs like Spybot and Avast.

Thanks for the help.

 

[Osiris]

http://www.techist.com/forums/f51/tech-forums-top-rated-firewall-173485/