zonealarm free firewall

Cable/DSL Firewall Router with 4 Port-Switch/VPN EndPoint firmware

Simple GUI for OS X PF firewall.

Access corporate resources behind the firewall.

Display PF firewall status in menu bar.

Group-based basic PF firewall frontend.

Front-end for the built-in PF firewall in OS X 10.7 or later.

Lightweight and fast application firewall.