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
openSUSE is a versatile Linux distribution suitable for various uses, offering robust package management and community support. In contrast, ReactOS is designed to be a lightweight alternative to Windows, focusing on compatibility with Windows applications but may struggle with hardware support and gaming.