What is-the best,most powerful Firewall?

[Boy Wonder]

I'd been using TinyWall for about 2 years, but recently, its learn function stopped working. I've since switched over to SimpleWall by Henry++. Works like a charm. Even Shields Up! agrees.

[Psynthax]

ZoneAlarm is the best one in my experience. It is great and often on sale, like it is now 50% off.

[uOpt]

pfsense by a wide margin.