illumos is a free and open-source Unix operating system. It derives from OpenSolaris, which in turn derives from SVR4 UNIX and Berkeley Software Distribution (BSD). illumos comprises a kernel, device drivers, system libraries, and utility software for system administration.
Arch Linux Alternatives
Arch Linux is described as 'Independently developed, x86_64 optimized GNU/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' and is a leading Linux Distro in the os & utilities category. There are more than 100 alternatives to Arch Linux for a variety of platforms, including Linux, Self-Hosted, Windows, BSD and Mac apps. The best Arch Linux alternative is Manjaro Linux, which is both free and Open Source. Other great apps like Arch Linux are Linux Mint, Ubuntu, Debian and Fedora.
Alternatives list
Ubuntu Christian Edition (UbuntuCE) is a free, open source operating system geared towards Christians. Ubuntu is a complete Linux-based operating system, freely available with both community and professional support.

ExectOS aims to be a stable and flexible, general purpose operating system written from scratch. It is designed to be modular, maintainable and compatible with existing software. It implements a brand new XT architecture and features own native application interface.
Suckless tools based minimalist and functional distribution for aesthetics and simple usage based on Arch Linux.
Cost / License
- Free
- Open Source
Platforms
- Linux
- Arch Linux


+3
- 51 Ageless Linux alternatives
Software for humans of indeterminate age. We don't know how old you are. We don't want to know. We are legally required to ask. We won't.


OpenIndiana is a robust enterprise operating system, based on the illumos kernel. It is open source, free to use, community developed, and suitable for servers and desktops.


+3
General purposed Web Desktop Operating Platform / OS for Raspberry Pis, Now written in Go! - tobychui/arozos


+1
Hanthana is a Linux based operating system and a Fedora remix suitable for desktop and laptop users. Hanthana comes to you in the form of a Live CD for regular PC (i686 architecture) systems.



GuestSneezeOS is a robust, free-to-use, lightweight, immutable, operating system designed to bring the functionality of Valve's SteamOS to a wide range of devices, including desktops, laptops, and more.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Linux
- SteamOS





+2
ravynOS is a new open-source desktop operating system that aims to provide a similar experience and compatibility with macOS on x86-64 systems.


Cost / License
- Free
- Open Source
Application types
Alerts
- Discontinued
Platforms
- Linux

































You need to switch between LTS versions in order to have lastest packages. Not good for my usage. Might be good for you...