d77void GNU/Linux is a Void-based Linux distribution created to demonstrate the capabilities of Void's tools, such as void-mklive and void-packages. Originally initiated as a Void respin with the Fluxbox window manager, the project has evolved to offer a wide range of window manager, Wayland compositor and desktop environment options, including Awesome, bspwm, COSMIC, dwm, Fluxbox, herbstluftwm, Hyprland, i3wm, JWM, labwc, LeftWM, LXQt, Niri, Openbox, Qtile, River, Sway, Wayfire and Xfce. The distribution can be installed to a hard disc with the text-mode d77void-installer.
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Slimbook OS is an Ubuntu-based Linux distribution customised for the Slimbook line of Linux computers assembled in Spain. It offers a choice of GNOME or KDE Plasma desktops on a single ISO image which also includes some custom extensions and utilities. The distribution provides its own repositories for some software, prioritising DEB and Flatpak packages over Ubuntu's snap options. Some of the other interesting features of Slimbook OS include touchpad gestures (enabled by default), Slimbook service notifications, window tiling, the Terminator terminal emulator, a Ulauncher application for fast searching, and a day/night mode switcher. 
Nitrux is a desktop Linux distribution built from Debian, but with an immutable base system, the OpenRC init system, and without any traditional Debian package management tools. It uses the Calamares system installer and includes the Hyprland window manager, Hypr utilities, the greetd+QtGreet login manager, and the Waybar Wayland bar. Nitrux emphasizes the use of AppBox to manage end-user software and it also supports AppImage and Flatpak package formats. 
NetHydra (formerly HydraPWK GNU/Linux) is a Debian-based distribution designed primarily for penetration testing. It contains a collection of penetration testing tools, including tools for information gathering, scanning, stress testing, exploitation, cracking, reversing engineering and forensics. Formerly known as BlackTrack, the distribution uses a real-time Linux kernel and features the Xfce desktop. 
HydraPWK GNU/Linux is a Debian-based distribution designed primarily for penetration testing. It contains a collection of penetration testing tools, including tools for information gathering, scanning, stress testing, exploitation, cracking, reversing engineering and forensics. Formerly known as BlackTrack, the distribution uses a real-time Linux kernel and features the Xfce desktop. 
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. 
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. 
