Top Alternatives to ZoneAlarm Free Firewall

Little Snitch is a host-based application firewall for Mac OS X. It can be used to monitor applications, preventing or permitting them to connect to attached networks through advanced rules.

GlassWire free firewall software and network monitor can detect threats other miss.

Gufw is a firewall powered by UFW (Uncomplicated Firewall).

TinyWall is a free, feature-rich, and lightweight firewall for Windows, known for its unique no-popup approach.

Windows 10 Firewall Control is a simple and exhaustive solution for applications network activity controlling and monitoring.

Windows Firewall Control is a tool to control the native firewall.

Privatefirewall is a multi-layered endpoint security software protects Windows from network based attacks.

PC Tools Firewall Plus is a firewall software.

Radio Silence is a firewall that allows you to monitor & block apps that make unwanted network connections.

Windows Firewall Notifier is embedded Windows firewall and offers real time connections monitoring, connections map, bandwidth usage monitoring.

Hands Off! is a computer monitoring software.