CoreOS is described as 'new Linux distribution that has been rearchitected to provide features needed to run modern infrastructure stacks' and is a Operating System in the OS & Utilities category. There are more than 50 alternatives to CoreOS for a variety of platforms, including Linux, Self-Hosted solutions, Mac, Windows and Online / Web-based. The best alternative is Debian, which is both free and Open Source. Other great apps like CoreOS are Linux Mint (Free, Open Source), Manjaro Linux (Free, Open Source), Fedora (Free, Open Source) and elementary OS (Free, Open Source).
Black Lab Linux is a custom Linux distribution that focuses on bringing stability to desktop Linux. This system provides high performance and enhanced multimedia capabilities to home, business, and professional desktop Linux users.
Mabox Linux is based on Manjaro, featuring a customized Openbox window manager preconfigured to be ready to use. It was inspired by CrunchBang, and uses some BunsenLabs utilities adapted for Manjaro. Mabox Linux uses some of XFCE and LXDE components.
Pearl Linux OS has been available for free download since 12/2014 with our first release simply titled Pearl Linux. It was based on the 14.04 released version of Ubuntu. That release was using the XFCE desktop environment.
The unofficial successor of Antergos, RebornOS is an Arch-based distro that focuses on allowing the user to decide exactly how they want their system while making it easy for anyone to do so - both during installation and afterwards.
Ubuntu Cloud is an open source Linux operating system designed to be used as a personal cloud server. It is based on the well known Ubuntu Linux distribution and recognized as an official Ubuntu flavor, distributed by Canonical.
The OpenMandriva distribution is a full-featured Linux desktop and server, sponsored by the OpenMandriva Association, and is based on ROSA, a Russian Linux distribution project which forked Mandriva Linux in 2012.