When it comes to firewalls, you'd be amazed at how many people I've known without one. From friends to colleagues, they all say the same thing, "what do I need that for"? ... well, the first thing I'd say to that is every antivirus software has it's weaknesses, it can't possibly catch 100% of the nasties all of the time, and when that little gem does get through it's probably going to enjoy calling home or sending all kinds of data from your machine. With a firewall in place, that's often prevented outright and you're alerted to the fact something or someone is trying to send data from your machine.
There have been bag loads of firewalls released over the years, though we've listed some of the most popular freeware one's and we're asking you to choose which one you would consider the best ... if you can't see your favourite just reply and I'll add it to the list for you to choose
Me, personally, I favour PC Tools Firewall Plus, not one of the major players but for me it does it's job well, get's on without constantly hassling me to make a decision and uses minimum resources!.
Marko