reactos.org

Main page screenshot of reactos.org
Competing rank
 

2.32 out of 5 by TopAlternate
Reviewed on Sep 19st, 2017
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Frontpage - ReactOS Website

ReactOS® is a free, modern operating system based on the design of Windows® XP/2003. Written completely from scratch, it aims to follow the Windows® architecture designed by Microsoft® from the hardware level right through to the application level.

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