Puppy Linux is an operating system and lightweight Linux distribution that focuses on ease of use and minimal memory footprint.
License: Open Source
Puppy Linux is a lightweight, user-friendly Linux distribution ideal for older hardware, while ReactOS aims to be an open-source alternative to Windows, focusing on compatibility with Windows applications. Puppy Linux is best for users wanting a simple, fast OS for basic tasks, whereas ReactOS is suited for those needing Windows functionality.