An official variant of Ubuntu, Ubuntu Studio is a Linux-based operating system for creative individuals in the areas of audio production, video production, graphics design, photography and desktop publishing. It makes professional audio accessible on Linux; it uses the JACK sound server and a kernel built with a low-latency patch. Up until version 20.10 Ubuntu Studio shipped with the Xfce desktop environment, but this was replaced by KDE Plasma in October 2020.

Ubuntu Unity is a flavour of Ubuntu featuring the Unity desktop environment (the default desktop environment developed and used by Ubuntu from 2010 to 2017). Unity debuted in the netbook edition of Ubuntu 10.10; it was initially designed to make more efficient use of space given the limited screen size of netbooks, including a vertical application switcher called "the launcher" and a space-saving horizontal multipurpose top menu bar. Ubuntu switched from Unity to GNOME in 2017, but the desktop was resurrected again as an unofficial "Ubuntu Unity Remix" in 2020. It became an official flavour of Ubuntu during the development cycle of Ubuntu 22.10 in 2022.

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

Ubuntu MATE is a desktop Linux distribution which aims to bring the simplicity and elegance of the Ubuntu operating system through a classic, traditional desktop environment - the MATE desktop. MATE is the continuation of the GNOME 2 desktop environment which was used as Ubuntu's default desktop until 10.10 (when it was replaced by Unity). The project began its life as an Ubuntu "remix", but starting with version 15.04, it was formally accepted as an official member of the Ubuntu family of Linux distributions.

Ubuntu Kylin is an official Ubuntu flavour whose primary goal is to create a variant of Ubuntu optimised for Chinese users (using the Simplified Chinese writing system), although it also supports other languages. The default desktop is called UKUI (Universal Kylin User Interface) which is based on MATE desktop and is developed with the Qt toolkit. UKUI strives to adhere to the friendly-and-simple design concept. The distribution also includes more than 20 applications developed in-house, including Kylin Assistant, Kylin Video, Kylin Screenshots and Software Center.

Ubuntu Cinnamon is an official flavour of the Ubuntu distribution featuring the Cinnamon desktop. The project strives to offer modern tools while providing a user-friendly desktop which will feel familiar for users coming from other operating systems, such as Microsoft Windows.

Ubuntu Budgie (previously budgie-remix) is an Ubuntu-based distribution featuring the Budgie desktop, originally developed by the Solus project. Written from scratch and integrating tightly with the GNOME stack, Budgie focuses on simplicity and elegance, while also offering useful features, such as the Raven notification and customisation centre.

Lubuntu is a variant of Ubuntu that uses the LXQt desktop environment. (Versions prior to 18.10 shipped with the LXDE desktop.) It includes essential applications and services for daily use, including office suite, PDF reader, image editor and multimedia players. A distribution available for both 32-bit and 64-bit computers, Lubuntu is intended to be user-friendly, lightweight and energy efficient.

Kubuntu is a free, user-friendly Linux distribution based on KDE's desktop software and on the Ubuntu operating system. It has a biannual release cycle. Besides providing an up-to-date version of the KDE desktop at the time of the release, the project also releases updated KDE packages throughout the lifetime of each release.

Edubuntu is a partner project of Ubuntu, a distribution suitable for classroom use. The aim is that an educator with limited technical knowledge and skill will be able to set up a computer lab, or establish an on-line learning environment, in an hour or less, and then administer that environment without having to become a fully-fledged Linux geek.

Ubuntu is a complete desktop Linux operating system, freely available with both community and professional support. The Ubuntu community is built on the ideas enshrined in the Ubuntu Manifesto: that software should be available free of charge, that software tools should be usable by people in their local language and despite any disabilities, and that people should have the freedom to customise and alter their software in whatever way they see fit. "Ubuntu" is an ancient African word, meaning "humanity to others". The Ubuntu distribution brings the spirit of Ubuntu to the software world.

SME Server (known as e-smith at the time) was founded in January 1999 by Joseph and Kim Morrison. The company introduced the first version of its flagship software product, the e-smith server and gateway, in April 1999. By the end of the year, many thousands of e-smith servers were running in countries from Fiji to Finland. Word was spreading quickly among developers and systems integrators who needed a solid, easy-to-use server for their small-business customers. In July 2001, e-smith was acquired by Mitel Networks, but was later released as an open-source product under the GPL licence. In May 2013 a new not-for-profit organisation was set up to manage SME server. Due to copyright issues it was named Koozali SME Server Inc. The word "Koozali" approximates to Swahili for "rebirth". Future versions will use this name. The distribution, which is based on CentOS, is currently entirely funded by donations.

Puppy Linux is yet another Linux distribution. What's different here is that Puppy is extraordinarily small, yet quite full-featured. Puppy boots into a ramdisk and, unlike live CD distributions that have to keep pulling stuff off the CD, it loads into RAM. This means that all applications start in the blink of an eye and respond to user input instantly. Puppy Linux has the ability to boot off a flash card or any USB memory device, CDROM, Zip disk or LS/120/240 Superdisk, floppy disks, internal hard drive. It can even use a multisession formatted CD-RW/DVD-RW to save everything back to the CD/DVD with no hard drive required at all.

Refracta is a Linux distribution based on Devuan GNU+Linux (a systemd-free fork of Debian), designed primarily for home computer users and also for use as a system rescue and recovery disk. It provides a simple and familiar layout using the Xfce desktop. Other desktop environments and additional software packages are available from the Devuan package repository. Besides providing a Linux distribution on a live CD, the project also develops useful tools, such as refractainstaller, refractasnapshot and refracta2usb which allow users to customize the installation and create custom live CD or live USB images.

Feren OS is a desktop Linux distribution based on Ubuntu and featuring the KDE Plasma desktop. It ships with a tweaked Calamares system installer, a custom theme and fonts, the Vivaldi web browser, boot options for advanced users, and a Feren OS Tour application, among the many home-built features and improvements. Prior to November 2020, the distribution was based on Linux Mint and included an edition with the Cinnamon desktop.

Linuxfx is a Brazilian Linux distribution based on Ubuntu. It ships with an intuitive Cinnamon desktop user interface designed to facilitate migration of users from Windows. It includes a video management system called Sentinela, a computer vision software with video analytics and software for access control (facial recognition and automatic number plate recognition), object detection, gender, age and mood detection. Other features of the distribution include a new personal assistant, a WX theme for desktop and system applications, and compatibility with software written for Windows (.exe and .msi) through a Wine port. Following the release of Linuxfx 10.6 the distribution became a commercial offering.

Chimera Linux is an independent distribution which uses an unusual combination of technologies behind the scenes. Chimera Linux uses BSD userland command line tools, the Clang/LLVM compiler toolchain, Dinit for service management, and APK for package management. Chimera Linux strives to keep the design simple while still providing the experience and features most users want, such as multiple desktop environments, Flatpak support, a graphical package manager, and easy access to desktop configuration tools. Chimera Linux does not have a system installer, instead providing manual command line instructions to bootstrap the operating system from a live environment.

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.

EndeavourOS is a rolling release Linux distribution based on Arch Linux. The project aims to be a spiritual successor to Antergos - providing an easy setup and pre-configured desktop environment on an Arch base. EndeavourOS offers both off-line and on-line install options. The off-line installer, Calamares, uses the Xfce desktop by default. The on-line installer can install optional software components, including most popular desktop environments.

Netrunner is a Debian-based distribution featuring a highly customised KDE desktop with extra applications, multimedia codecs, Flash and Java plugins, and a unique look and feel. The modifications are designed to enhance the user-friendliness of the desktop environment while still preserving the freedom to tweak. A separate "Rolling" edition, based on Manjaro Linux, was launched in 2014, was discontinued, re-launched in 2017, and discontinued again in 2019.

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.

AUSTRUMI (Austrum Latvijas Linukss) is a bootable live Linux distribution based on Slackware Linux. It requires limited system resources and can run on any Intel-compatible system with a CD-ROM installed. The entire operating system and all of the applications run from RAM, making AUSTRUMI a fast system and allowing the boot medium to be removed after the operating system starts.

Plop Linux is a small distribution that can boot from CD, DVD, USB flash drive (UFD), USB hard disk or from network with PXE. It is designed to rescue data from a damaged system, backup and restore operating systems, automate tasks and more.

Univention Corporate Server is an enterprise-class distribution based on Debian GNU/Linux. It features an integrated management system for central administration of servers, Microsoft Active Directory-compatible domain services, and functions for parallel operation of virtualised server and desktop operating systems. UCS offers such features as a single sign-on portal and an app centre. One key component of UCS is the Identity and Access Management (IAM) utility which acts as a central solution for managing identities, roles, and groups. The integrated portal with Single Sign-On and self-service functions provides access to all IT services and applications and can work across blended Linux, Windows, and macOS networks.

Qubes OS is a free and open-source, security-oriented operating system for single-user desktop computing. Qubes OS leverages Xen-based virtualization to allow for the creation and management of isolated compartments called qubes. These qubes, which are implemented as virtual machines (VMs). This allows each component of the operating system to be isolated from other pieces, preenting compromises from spreading or information from leaking.

Void is an independently-developed, general-purpose operating system based on the monolithic Linux kernel. It features a hybrid binary/source package management system which allows users to quickly install, update and remove software, or to build software directly from sources with the help of the XBPS source packages collection. Other features of the distribution include support for Raspberry Pi single-board computers (both armv6 and armv7), rolling-release development model with daily updates, and native init system called "runit".

Nitrux is a Linux distribution based on Debian's Unstable (sid) branch with additional packages pulled in from Ubuntu LTS repositories. Nitrux strives to be a distribution suitable for laptops and desktop computers. Its main desktop environment is NX Desktop, a KDE Plasma desktop enhanced with "plasmoids" to create a special blend of aesthetics and functionality. The project also focuses on using redistributable, portable applications using the AppImage format. Registration with an e-mail address was required to download this distribution, however public downloads have been available since mid-2020.

Parrot (formerly Parrot Security OS) is a Debian-based, security-oriented distribution featuring a collection of utilities designed for penetration testing, computer forensics, reverse engineering, hacking, privacy, anonymity and cryptography. The product, developed by Frozenbox, comes with MATE as the default desktop environment.

Snal Linux is a small Linux distribution based on Arch Linux. It features the i3 window manager and it includes the Firefox web browser, as well as a handful of network and filesystem utilities. It is intended to be used as a live image to troubleshoot hard disk, system and network problems.

GParted Live is a live distribution with a single purpose - to provide tools for partitioning hard disks in an intuitive, graphical environment. The distribution uses X.Org, the light-weight Fluxbox window manager, and the latest 4.x Linux kernel. GParted Live runs on most x86 machines with a Pentium II or better.

Rhino Linux is an Ubuntu-based distribution which offers a rolling-release upgrade approach. The distribution uses a customised Xfce desktop environment. Rhino features a custom meta package manager which unifies Deb, Pacstall and Flatpak software management.

Relianoid is a Debian-based Linux distribution for load balancing. The distribution offers a load balancing oriented operating system for testing, development, and quality assurance environments. Relianoid is available in Community (free of cost) and Enterprise editions.

The Amnesic Incognito Live System (Tails) is a Debian-based live DVD/USB with the goal of providing complete Internet anonymity for the user. The product ships with several Internet applications, including web browser, IRC client, mail client and instant messenger, all pre-configured with security in mind and with all traffic anonymised. To achieve this, Incognito uses the Tor network to make Internet traffic very hard to trace.

Venom Linux is an independently-developed, rolling-release distribution inspired by CRUX. It targets experienced Linux users. Venom uses SysV init as the main init system and BSD-like ports as software packages which are managed by a custom package management tool called scratchpkg (written in compliance with POSIX standards). The distribution offers a simple graphical desktop built around the Openbox window manager and a text-mode system installer.

openmamba GNU/Linux is a distribution for personal computers that can be used on notebooks, desktops, servers and Raspberry Pi computers. It works as an installable live DVD/USB images, offering one of two desktop environments: KDE Plasma or LXQt. The distribution uses RPM packages managed through the DNF package manager. Software can also be fetched and installed from Flatpak repositories.

Alpine Linux is a community developed operating system designed for routers, firewalls, VPNs, VoIP boxes, containers, and servers. It was designed with security in mind; it has proactive security features like PaX and SSP that prevent security holes in the software to be exploited. The C library used is musl and the base tools are all in BusyBox. Those are normally found in embedded systems and are smaller than the tools found in GNU/Linux systems.

Arch Linux is an independently developed, x86_64-optimised Linux distribution targeted at competent Linux users. It uses 'pacman', its home-grown package manager, to provide updates to the latest software applications with full dependency tracking. Operating on a rolling release system, Arch can be installed from a CD image or via an FTP server. The default install provides a solid base that enables users to create a custom installation. In addition, the Arch Build System (ABS) provides a way to easily build new packages, modify the configuration of stock packages, and share these packages with other users via the Arch Linux user repository.

Dr.Parted Live is a bootable GNU/Linux distribution based on Debian Testing. It is a live CD/USB featuring a lightweight Openbox window manager and useful applications for data backup, restore and recovery.

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.