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
Deepin is a polished Linux distribution focused on user experience and aesthetics, while ReactOS aims to provide a Windows-compatible environment for running legacy applications. Deepin offers a rich set of features and applications, whereas ReactOS is designed for users needing a lightweight OS that mimics Windows.