Windows 10 is described as 'A versatile OS with universal app architecture, free initial year offer, redesigned UI for mouse and touch, virtual desktop, and improved security' and is a very popular operating system in the os & utilities category. There are more than 100 alternatives to Windows 10 for a variety of platforms, including Linux, Self-Hosted, Windows, Mac and BSD apps. The best Windows 10 alternative is Linux Mint, which is both free and Open Source. Other great apps like Windows 10 are Ubuntu, Debian, Fedora and ReactOS.
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.
ExTiX is a desktop Linux distribution and live DVD based on Ubuntu, offering a choice of alternative desktop environments.
Sweden
EU
CRUX is a lightweight GNU/Linux distribution for the x86-64 architecture targeted at experienced users. The primary focus of this distribution is keep it simple, which is reflected in a straightforward tar.
BSD-derived desktop OS designed for usability, featuring graphical ports management, GNUstep system configuration, standard tools for daily tasks including email, web browsing, and word processing, supporting multiple licenses like BSD, X.org, and GNUstep.
United States
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.
Obarun is a GNU/Linux operating system that relies on s6/66 init and service management suite. The goal of Obarun is to provide an alternative for people looking for more simplicity and transparency in maintaining their systems.
TOS is an operating system developed by Tom Meyers The idea has been created because of one main reason. Installing arch always took a lot of time. After you installed it and had all software installed you spend an entire day of work.
The ubermix is an all-free, specially built, Linux-based operating system designed from the ground up with the needs of education in mind.
United States
The CLIP OS project is an open source project maintained by the ANSSI (National Cybersecurity Agency of France) that aims to build a secure, multi-level operating system, based on the Linux kernel and a lot of free and open source software.
France