SmartOS is an open-source UNIX-like operating system based on illumos, a community fork of OpenSolaris. It features four technologies - ZFS (a combined file system and logical volume manager), DTrace (a dynamic tracing framework for troubleshooting kernel and application problems), Zones (a lightweight virtualisation solution), KVM and bhyve (two full virtualisation solutions for running a variety of guest operating systems, including Linux, Windows, BSD and Plan9). SmartOS is designed to be particularly suitable for building clouds and generating appliances.

KDE neon is a Ubuntu-based Linux distribution and live DVD featuring the latest KDE Plasma desktop and other KDE community software. Besides the installable DVD image, the project provides a rapidly-evolving software repository with all the latest KDE software. Two editions of the product are available - a "User" edition, designed for those interested in checking out the latest KDE software as it gets released, and a "Developer's" edition, created as a platform for testing cutting-edge KDE applications.

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.

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.

GobMis GNU/Linux is a Linux distribution adopted to the needs of public administration offices in the Misiones province of Argentina. It is based on Devuan and uses the Xfce desktop environment. The distribution comes with a NextCloud and OpenVPN-based client software that connects to central work servers, as well as a selection of applications commonly used in government offices. The project uses free software and open document standards, and it also supports the objectives of sustainable development. GobMis GNU/Linux is available publicly and without any cost, inclusive of extensive documentation.

MODICIA O.S. is a Linux multimedia distribution designed primarily for musicians, graphic designers and video makers. It is based on Debian's "stable" branch, but uses the Cinnamon desktop and a recent Linux kernel. MODICIA O.S. comes with a set of carefully-selected, open-source multimedia software and tools, such as Audacity (audio editor), Brasero (disc-burning utility), Cheese (webcam application), Curlew (multimedia converter), GIMP (graphics editor), HandBrake (video transcoder), Kdenlive (video editor), MediaInfo (tool that provides technical data about media files), mpv (media player), Peek (animated GIF recorder), RawTherapee (photo processor), XnView (image viewer), and many others. The distribution also integrates the OnlyOffice software suite for general office tasks.

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.

MidnightBSD is a FreeBSD-derived operating system. A critical goal of the project is to create an easy-to-use desktop environment with graphical ports management, and system configuration using GNUstep. The vast majority of the operating system will maintain a BSD license. MidnightBSD was forked from FreeBSD 6.1 beta.

Founded in 2014 by Oliver Pinter and Shawn Webb, HardenedBSD is a security-enhanced fork of FreeBSD. The HardenedBSD Project is implementing many exploit mitigation and security technologies on top of FreeBSD. The project started with Address Space Layout Randomization (ASLR) as an initial focal point and is now implementing further exploit mitigation techniques.

NuTyX is a French Linux distribution (with multi-language support) built from Linux From Scratch and Beyond Linux From Scratch, with a custom package manager called "cards". The package manager can install individual binary packages, a group of related binary packages (e.g. desktop packages, such as KDE or Xfce), and compile source packages from "ports". The distribution is designed for intermediate and advanced Linux users.

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.

The OpenMandriva distribution is a full-featured Linux desktop and server, sponsored by the OpenMandriva Association. It was based on ROSA, a Russian Linux distribution project which forked Mandriva Linux in 2012, incorporating many of Mandriva's original tools and utilities and adding in-house enhancements. The goal of OpenMandriva is to facilitate the creation, improvement, promotion and distribution of free and open-source software in general, and OpenMandriva projects in particular. OpenMandriva has traditionally been a fixed release distribution, but in 2023 the project began releasing an alternative rolling branch called ROME.

KaOS is a desktop Linux distribution that features the latest version of the Noctalia desktop environment, the Calligra office suite, and other popular software applications that use the Qt toolkit. It was inspired by Arch Linux, but the developers build their own packages which are available from in-house repositories. KaOS employs a rolling-release development model and is built exclusively for 64-bit computer systems.

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.

Recalbox is a dedicated operating system for running video games on emulated retro and console platforms. Recalbox can also be used to run the Kodi media centre. The distribution's interface is primarily navigated with a console game controller, though keyboard support is available for many functions.

REMnux is an Ubuntu-based Linux distribution with a toolkit for reverse-engineering and analysing malicious software. It provides a curated collection of free tools created by the community. Analysts can use it to investigate malware without having to find, install and configure the tools.

FunOS is an Ubuntu-based Linux distribution which features the JWM graphical user interface. The project is intended to be more lightweight than official Ubuntu community editions while providing the same application compatibility and hardware support.

Synex is a GNU/Linux distribution based on Debian's "Stable" branch, developed with the official Debian Live Build tool. It offers four separate desktop options with GNOME, LXDE, KDE Plasma and Xfce, all of which are composed of a rather frugal set of applications in its default state, without any development tools or offices suites. Some of the distribution's main features include Calamares installer with support for both BIOS and UEFI, CUPS integration for printing and network support, out-of-the box support for Flatpak applications, official NVIDIA driver installation assistant with support for both X11 and Wayland, and additional repositories containing Microsoft Edge, OnlyOffice and Zabbix.

Whonix is an operating system focused on anonymity, privacy and security. It is based on the Tor anonymity network, Debian GNU/Linux and security by isolation. Whonix consists of two parts: One solely runs Tor and acts as a gateway, which is called Whonix-Gateway. The other, which is called Whonix-Workstation, is on a completely isolated network. Only connections through Tor are possible. With Whonix, you can use applications and run servers anonymously over the Internet. DNS leaks are impossible, and even malware with root privileges cannot find out the user's real IP.

Kicksecure is a security-hardened Linux distribution based on Debian's "Stable" branch, with Xfce as the default desktop user interface. It is a hardened operating system designed to be resistant to viruses, malware and attacks, and extensively reconfigured in accordance with an advanced multi-layer defense model, thereby providing in-depth security. Kicksecure provides protection from many types of malware in its default configuration with no customization required.

OmegaLinux is an Lubuntu-based distribution featuring the lightweight LXDE desktop, suitable for installation on older computers. The developers attempt to reduce Lubuntu's size and footprint by removing all Qt libraries and dependent software, office suites and snap packages, while using lighter alternatives wherever possible.

VailuxOS is a German, desktop-oriented Linux distribution based on Ubuntu's long-term support (LTS) branch or Debian's "Stable" branch. The project's primary goal is to make the transition from Windows to Linux as seamless as possible by maintaining familiar ways of working and workflows. The distribution uses the KDE Plasma desktop.

Xubuntu is a community-developed operating system based on Ubuntu. It comes with Xfce, which is a stable, light and configurable desktop environment.