ReactOS

ReactOS is a free and open-source operating system for personal computers intended to be binary-compatible with computer programs and device drivers made for Windows Server 2003 and later versions of Windows.
Homepage:	https://reactos.org/
Source Code:	https://github.com/reactos/reactos
License:	GPL-2.0
Cost:	Free
Wikidata ID:	Q234025
Function:	Emulation
Content type:	Software

Description

ReactOS is an Open Source effort to develop a quality operating system that is compatible with applications and drivers written for the Microsoft® Windows™ NT family of operating systems (NT4, 2000, XP, 2003, Vista, 7).