Operating System
17.4k 2026-04-18

reactos/reactos

A free, open-source operating system designed for binary compatibility with Microsoft Windows NT applications and drivers.

Core Features

Binary compatibility with Microsoft Windows NT family (NT4, 2000, XP, 2003, Vista, 7)
Open Source, licensed under GNU GPL 2.0
Supports FAT16, FAT32, and experimental BtrFS file systems for installation
Actively developed, currently in Alpha quality

Detailed Introduction

ReactOS is an ambitious open-source project dedicated to developing a free operating system that achieves binary compatibility with the Microsoft Windows NT family. Its primary goal is to allow users to run Windows applications and drivers natively, providing a viable alternative to proprietary Windows systems. Currently in an alpha development stage, ReactOS focuses on Windows Server 2003 compatibility while continuously working towards broader compatibility with future Windows NT releases. The project is under active development, relying on community contributions to evolve into a fully functional, Windows-compatible OS.

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