PCTools Firewall Plus
is free, not for a 12 month period, not even for a 1 month period.....it's just FREE.
I've been running it for quite a few months, it's up to version 4 BTW.
It's low on resources, (currently using less than 6MB on my system and 0% CPU according to TaskManager), rule creation is far easier/better than Comodo.
Yes, it fails some leaktests but I'm using it for access control not testing for leaks.
The only thing I have to say against it is that access requesters are a little slow to popup.