Windows 10 is described as 'personal computer operating system released by Microsoft as part of the Windows NT family of operating systems To encourage its adoption, Microsoft announced that during its first year of availability, Windows 10 would be made available free of charge to users' and is a well-known app in the OS & Utilities category. There are more than 100 alternatives to Windows 10 for a variety of platforms, including Linux, Self-Hosted solutions, Windows, BSD and Mac. The best alternative is Ubuntu, which is both free and Open Source. Other great apps like Windows 10 are Linux Mint (Free, Open Source), Debian (Free, Open Source), Manjaro Linux (Free, Open Source) and Windows 7 (Paid).
MidnightBSD is a new BSD-derived operating system developed with desktop users in mind. It includes all the software you'd expect for your daily tasks — email, web browsing, word processing, gaming, and much more.
Bluestar Linux is an Arch Linux-based distribution, built with an understanding that people want and need a solid Operating System that provides a breadth of functionality and ease of use without sacrificing aesthetics.
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.
UberStudent is a free, full-featured, user-friendly Linux operating system for learning, doing, and teaching the essential skills of academic success at the higher education and advanced secondary levels. It is supported by a free virtual learning environment.
AcademiX GNU/Linux is a Debian-based Linux distribution developed specifically for education. The distribution was built on the Debian Linux (Stretch / Buster) distribution and contains free software for education.