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
Arch Linux is a rolling-release Linux distribution known for its customization and advanced user control, making it ideal for enthusiasts and developers. ReactOS is an open-source operating system aimed at running Windows applications, making it suitable for users needing Windows compatibility but with a lightweight footprint.