Debian is a free software operating system distribution. Debian releases a linux distribution called “Debian GNU/Linux”, which at over ten years in development is one of the oldest linux distributions still under active development. Although “Debian GNU/Linux” is the most popular Debian release, Debian has also unofficially released distributions based on other open source kernels: Hurd, NetBSD, and FreeBSD. The Debian Project Debian hews closely to the standards

SmoothWall Express is an open source firewall distribution based on the GNU/Linux operating system. SmoothWall includes a hardened subset of the GNU/Linux operating system, so there is no separate OS to install. Designed for ease of use, SmoothWall is configured via a web-based GUI, and requires little or no knowledge of Linux to install or use.

A GNU/Linux distribution, that takes all the non-free blobs out of the popular Ubuntu distribution and makes it free.

Ubuntu is a Linux distribution growing in popularity and based on Debian that focuses on desktop Linux. It is included in Sourcelabs’ Self-Support Offering for Linux Ubuntu has one of the largest, if not the largest and most active user communities of any Linux distribution. Ubuntu is also one of if not the most popular Linux distributions for desktop Linux use. Notable included packages Ubuntu packages the GNOME project as its window manager, however side projects Kubuntu and Xub