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.
GNU-Darwin aims to be the most free software distribution. Our mission is two-fold: Focus on projects that leverage our unique combination of Darwin and GNU, and help users to enjoy the benefits of software freedom.
miniBSD is a project to develop a set of scripts that shrinks a running FreeBSD system to a small sized miniBSD distribution suited for small media like USB pens and CF cards.
BeeFree OS is inspired from Ubuntu, Windows 7 and Linux Mint. The name is acronym for Beautiful, Effective, Efficient and Freedom.
Elive is a non-commercial, cost-free operating system designed for everyday use, it offers a much faster, friendlier and feature-rich alternative to your expensive and ineffective default OS.
Mabox Linux is based on Manjaro, featuring a customized Openbox window manager preconfigured to be ready to use.
Poland
EU
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.
A new OS/2-based operating system from Arca Noae, codenamed Blue Lion, arrived today, May 15, 2017, after nearly two years in development.
United States
ToaruOS is a completely-from-scratch hobby operating system: bootloader, kernel, drivers, C library, and user space including a composited graphical UI, dynamic linker, syntax-highlighting text editor, network stack, etc.
United States
Peropesis is a small-scale, minimalist, command-line-based Linux operating system. It's an incomplete system, but it's constantly being improved. Also, it is a free operating system created from a free software.
Lunar Linux is a source based Linux distribution. It is built entirely by compiling source code, using custom optimizations.
Superb Mini Server (SMS) is a Slackware-based server distribution with web, DNS, DHCP, file, print and fax servers, iptables firewall, mail server with spam filter and anti-virus scanner, and BitTorrent station.
