ZoneAlarm Anti-Spyware (short for: ZA AS): Although named Anti-Spyware, it is still a paid firewall product in the ZoneAlarm series. It lacks the privacy protection component compared to the Pro version.
The official site is giving away keys for 24 hours today. Just fill in your name and email address, and the server will immediately send the download link and a one-year registration code to the specified mailbox.