There have been quite a few potential Windows alternatives that have popped up from time to time over the years. In our Look Back column, we have been revisiting some of these. For example, earlier ...

ReactOS is an open source operating system designed to be compatible with Windows applications. It’s been in development for more than two decades and is still very much work-in-progress software, but ...

A volunteer-developed operating system that has spent 30 years reimplementing Microsoft Windows from the ground up has crossed a new threshold: ReactOS now runs Valve's original Half-Life — a ...

ReactOS is a free and open source operating system designed to be compatible with Windows software and drivers. While it’s been under active development since 1999, the operating system is still ...

There have been several attempts to make an unencumbered version of Windows. ReactOS is perhaps the best-known. You could also argue that Wine and its progeny, while not operating systems in the ...