ReactOS is a free and open-source operating system for x86/x64 personal computers intended to be binary-compatible with computer programs and devices. Developed by Aleksey Bragin
License: Open Source
ReactOS is an open-source operating system aiming for Windows compatibility, while PapyrOS is a lightweight and privacy-centric OS based on Debian. ReactOS focuses on providing a Windows-like experience, while PapyrOS emphasizes user-friendliness and privacy.