ClearOS System (ClarkConnect) is a Linux distribution, based on CentOS and Red Hat Enterprise Linux.

Untangle wins a network security solution.

IPCop is a Linux distribution which aims to provide a simple-to-manage firewall appliance based on PC hardware.

NethServer is an operating system for Linux enthusiasts, designed for small offices and medium enterprises.

Endian Firewall Community is an Open Source Firewall and UTM Appliance with offers unique usability and features.

Smoothwall is an Open Source free firewall that includes its own security-hardened GNU/Linux operating system and an easy-to-use web interface.