Windows 8 has been discontinued. Similar apps include Windows 10. It's paid, but Raspberry Pi OS and CentOS are free. Other options are OpenMandriva Lx, Univention Corporate Server (UCS), GhostBSD and KaOS. There's no shortage of Operating Systems like Windows 8, with more than 50 alternatives for Linux, self-hosting, Mac, Windows and the web.
Darwin is the Open Source operating system from Apple that forms the basis for Mac OS X, and PureDarwin is a community project to make Darwin more usable (some people think of it as the informal successor to OpenDarwin.
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.
Vinux is a Ubuntu derived distribution optimised for the needs of blind and partially sighted users. By default Vinux provides two screen-readers, Braille display support and an extremely friendly community.
RetroBSD is a port of 2.11BSD Unix intended for embedded systems with fixed memory mapping. The current target is Microchip PIC32 microcontroller with 128 kbytes of RAM and 512 kbytes of Flash.
