Open your windows to freedom!

Imagine running your favorite Windows applications and drivers in an open-source environment you can trust. That's ReactOS. A free, open source, Windows compatible operating system. It's written from scratch, not based on Linux, with 9,000,000+ lines of code and growing. More than 100 developers contributed along the years It aims to be lightweight with only 500MB HDD and 96MB RAM as the current minimum requirement. Developers enjoy a fast, CMake based build system that supports GCC, Clang and MSVC toolchains (including Visual Studio solutions support).

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  • c
  • c++
  • nt
  • win32
  • php


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ReactOS 2019 Projects

  • Ayush Kumar Sinha
    Developer Web Interface for ReactOS with Server-side JavaScript
    Developer Web Interface for ReactOS will be a single Interface which can address all developer needs from easily watching commits to triggering tests...
  • Brock Mammen
    File Search
    File managers are important tools provided by graphical operating systems to aid users in managing their files. ReactOS has its own file explorer...