ZoneAlarm, who makes one of the most popular personal firewall products on the market, has made their professional firewall product available for free today. You can go grab it here, any time between 9am today (November 18, 2008, Eastern time) and 9am tomorrow.
I was able to get my copy, and a serial number. But it took me a couple of tries due to their high server load today. Be patient and you should be able to get your copy without much trouble. The best time to get it may be later on in the afternoon today, or later tonight.
