Linux
OPNsense includes most of the features available in expensive commercial firewalls, and more in many cases.
IPFire is a Linux distribution, which focuses on ease of equipment, easy operation and high level of security. It is an intuitive web-based interface for operational management, the interface for the novice and experienced system administrator to provide a lot of intuitive configuration options.
ArcoLinux is an Arch Linux based distro that usesArch Linux as a baseelements from the AUR. ArcoLinux created elements.
Turnkey GNU/Linux is a free Debian based library of system images that pre-integrates and polishes the best free software components into secure, easy to use solutions.
ExTiX is based on Ubuntu desktop Linux distribution, offering a choice of KDE or LXQt desktop environments.
ReactOS is an Open Source effort to develop a quality operating system that is compatible with applications and drivers are written for the Microsoft® Windows™ NT family of operating systems (NT4, 2000, XP, 2003, Vista, Seven).
Slax Linux is a modern, portable, small and fast Linux operating system with the modular approach and outstanding design.
Neptune is a GNU/Linux Distribution for desktops based fully upon Debian 9.0 ('Stretch'), except for a newer kernel and some drivers.
SUSE Linux Enterprise Server is a Linux-based operating system developed by SUSE. It is designed for servers, mainframes, and workstations.
Cinnamon is a desktop environment developed by Linux Mint. It is based on GTK+ 3 and is available for use with the X Window System on any Linux or BSD distribution.
XigmaNAS is a distribution system that embeds open source storage systems and supports sharing across Windows, Mac, and Unix-like