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.

Maple Linux is a desktop Linux distribution based on Debian's "Stable" branch and featuring the Cinnamon desktop. It is designed primarily for users located in Canada, with specific Canadian defaults. The distribution ships with both English and Canadian French locales pre-configured and it uses CIRA Canadian Shield DNS for privacy-focused, malware-blocking DNS servers operated locally. Maple Linux is pre-configured with America/Toronto timezone, Canadian keyboard layouts, and default settings that make sense for Canadian users.

Voyager Live is an Xubuntu-based distribution and live DVD showcasing the Xfce desktop environment. Its features include the Avant Window Navigator or AWN (a dock-like navigation bar), Conky (a program which displays useful information on the desktop), and over 300 photographs and animations that can be used as desktop backgrounds. The project also develops several other editions of Voyager Live - a "GE" edition with GNOME Shell, a "GS" variant for Gamers, and a separately-maintained flavour based on Debian's "stable" branch.

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.

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.

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 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.