ZoneAlarm Free Firewall Alternatives for Windows

Simplewall is a robust and lightweight firewall application for Windows, designed to control and monitor network activity for applications. It leverages the Windows Filtering Platform (WFP) to provide granular control over outbound connections, enhancing privacy and security by allowing users to block unwanted network communication.

Privatefirewall is a layered endpoint security solution offering proactive protection against network-based attacks and malware for Windows operating systems. It combines firewall, intrusion detection, and application control in a single package.

PC Tools Firewall Plus was a free personal firewall software designed to monitor network traffic and protect users from unauthorized access and malicious threats. It offered features like real-time protection, application control, and network monitoring to enhance online security.

Windows Firewall Notifier (WFN) is a lightweight, portable utility that extends the native Windows Firewall's capabilities, providing real-time connection monitoring, bandwidth usage tracking, and granular control over outbound network connections.