Network Security Toolkit (NST) is a bootable live disc based on the Fedora distribution. The toolkit was designed to provide easy access to best-of-breed open source network security applications and should run on most x86 platforms. The main intent of developing this toolkit was to provide the network security administrator with a comprehensive set of open source network security tools. What we find rather fascinating with NST is that we can transform most x86_64 systems into a system designed for network traffic analysis, intrusion detection, network packet generation, wireless network monitoring, a virtual system service server, or a sophisticated network/host scanner.

CachyOS is a Linux distribution based on Arch Linux. It focuses on speed and security optimisations - the default Linux kernel is heavily optimised using the BORE (Burst-Oriented Response Enhancer) scheduler, while the desktop packages are compiled with LTO, x86-64-v3 and x86-64-v4 optimization, security flags and performance improvements. The available desktop environments and window managers include KDE, GNOME, Xfce, CuteFish, i3wm, Wayfire, LXQt, OpenBox, Cinnamon, UKUI, LXDE, MATE, Budgie, Qtile, Hyprland and Sway. CachyOS also ships with both graphical and command-line installers and provides a Firefox-based browser (called Cachy-Browser) with some security enhancements and performance optimisations.

EuroLinux is an enterprise-class Linux distribution made and supported by the EuroLinux company, built mostly from code of Red Hat Enterprise Linux. The origin of the system ensures compatibility with most popular enterprise Linux distributions including Red Hat Enterprise Linux, Oracle Linux, and CentOS. While primarily geared toward server workloads, EuroLinux can also be used for desktop computing or any environment where long-term stability and support are demanded.

openmamba GNU/Linux is a distribution for personal computers (Intel i686-compatible) that can be used on notebooks, desktops and servers. It works as an installable live CD, offering out-of-the box support for proprietary graphics drivers and wireless network cards, a variety of media codecs and 3D desktop with KDE. The distribution, which has roots in the discontinued QiLinux project, uses APT for RPM and Synaptic as its package management tools.

Rocky Linux is a community enterprise operating system designed to be 100% bug-for-bug compatible with Red Hat Enterprise Linux. It is available for the x86_64 and AArch64 processor architectures.

Daphile is a minimal operating system for running a digital audio player on a headless computer. The operating system and media manager can be controlled remotely using a web-based interface.

Calculate Linux is a Gentoo-based family of three distinguished distributions. Calculate Directory Server (CDS) is a solution that supports Windows and Linux clients via LDAP + SAMBA, providing proxy, mail and Jabbers servers with streamlined user management. Calculate Linux Desktop (CLD) is a workstation and client distribution (with a choice of Cinnamon, KDE Plasma, LXQt, MATE or Xfce desktops) that includes a wizard to configure a connection to Calculate Directory Server. Calculate Linux Scratch (CLS) is a live CD with a build framework for creating a custom distribution.

Linux Lite is a beginner-friendly Linux distribution based on Ubuntu's long-term support (LTS) release and featuring the Xfce desktop. Linux Lite primarily targets Windows users. It aims to provide a complete set of applications to assist users with their everyday computing needs, including a full office suite, media players and other essential daily software.

NetBSD is a free, secure, and highly portable UNIX-like Open Source operating system available for many platforms, from 64-bit AlphaServers and desktop systems to handheld and embedded devices. Its clean design and advanced features make it excellent in both production and research environments, and it is user-supported with complete source. Many applications are easily available through The NetBSD Packages Collection.

BlueOnyx is a server distribution based on AlmaLinux OS, Rocky Linux and CentOS. It is the mission of BlueOnyx to provide a fully-integrated Internet hosting platform that includes web, e-mail, DNS and file transfer services from a simple, user-friendly web-based interface that is easily installed on commodity hardware or virtual private server.

SparkyLinux is a lightweight, fast and simple Linux distribution designed for both old and new computers featuring customised Enlightenment and LXDE desktops. It has been built on the "testing" branch of Debian GNU/Linux.

FreeBSD is a UNIX-like operating system for the i386, amd64, IA-64, arm, MIPS, powerpc, ppc64, PC-98 and UltraSPARC platforms based on U.C. Berkeley's "4.4BSD-Lite" release, with some "4.4BSD-Lite2" enhancements. It is also based indirectly on William Jolitz's port of U.C. Berkeley's "Net/2" to the i386, known as "386BSD", though very little of the 386BSD code remains. FreeBSD is used by companies, Internet Service Providers, researchers, computer professionals, students and home users all over the world in their work, education and recreation. FreeBSD comes with over 20,000 packages (pre-compiled software that is bundled for easy installation), covering a wide range of areas: from server software, databases and web servers, to desktop software, games, web browsers and business software - all free and easy to install.

EasyOS is an experimental Linux distribution which uses many of the technologies and package formats pioneered by Puppy Linux. The distribution features custom container technology called Easy Containers which can run applications or the entire desktop environment in a container. Packages, desktop settings, networking and sharing resources over the network can all be controlled through graphical utilities.

CentOS as a group is a community of open source contributors and users which started in 2003 and has been sponsored by Red Hat since 2014. CentOS Linux versions up to CentOS Linux 8 are 100% compatible rebuilds of Red Hat Enterprise Linux, in full compliance with Red Hat's redistribution requirements. In 2020 it was announced CentOS Linux is being discontinued and replaced with CentOS Stream, a developer-focused distribution which acts as a middle-stream between Fedora and Red Hat Enterprise Linux.

The openSUSE project is a community program sponsored by SUSE Linux and other companies. Promoting the use of Linux everywhere, this program provides free, easy access to openSUSE, a complete Linux distribution. The openSUSE project has three main goals: make openSUSE the easiest Linux for anyone to obtain and the most widely used Linux distribution; leverage open source collaboration to make openSUSE the world's most usable Linux distribution and desktop environment for new and experienced Linux users; dramatically simplify and open the development and packaging processes to make openSUSE the platform of choice for Linux developers and software vendors.

TUXEDO OS is an Ubuntu-based distribution developed in Germany by TUXEDO Computers GmbH, designed and optimised for the company's own range of Linux-friendly personal computers and notebooks. The distribution uses KDE Plasma as the preferred desktop. Some of the differences between Ubuntu and TUXEDO OS include custom boot menu, the TUXEDO Control Centre, Calamares installer, availability of the Lutris open gaming platform, preference for the PipeWire audio daemon (over PulseAudio), removal of Ubuntu's snap daemon and snap packages, and various other tweaks and enhancements.

Regata OS is a Brazilian Linux distribution based on openSUSE, focusing on desktop and gaming needs. Its main characteristics include a Regata OS store for installing applications and games, out-of-the-box integration with Google Drive, support for a gaming mode via the Vulkan graphics API, an extensive library of games in the Regata OS Game Access portal, support for configuration of hybrid graphics in notebooks, and easy transfer of files between a computer and a smartphone. The distribution's user interface is KDE Plasma.

PrimTux is a Debian- and Ubuntu-based distribution developed by a small team of school teachers and computer enthusiasts in educational environments. It is not intended to replace or become the main operating system of a modern computer, but an upgrade for obsolete equipment and benefiting the school or educational environment in the spirit of education.

T2 is an open-source system development environment (or distribution build kit if you are more familiar with that term). T2 allows the creation of custom distributions with bleeding-edge technology. Currently, the Linux kernel is normally used, but the project is expanding to Hurd, OpenDarwin and OpenBSD. T2 started as a community driven fork from the ROCK Linux Project with the aim to create a decentralised development and a clean framework for spin-off projects and customised distributions.

Bluestar Linux is a GNU/Linux distribution that is based on Arch Linux. The Bluestar distribution features up to date packages, a full range of desktop and multimedia software in the default installation and a live desktop DVD.