1. ReactOS Projectreactos-logo


    They’re talking about ReactOS 0.4.0 (Even if we’re just Alpha) You’re just a click … ReactOS is a Free Community Opensource Collaborative Compatible Free …

ReactOS Deutschland e.V.

Location:Am Bach 11
33378 Rheda-Wiedenbrück
GermanyE-Mail:deutschland@reactos.orgHomepage:http://ev.reactos.orgRegister of associations:Rheda-WiedenbrückDistrict court:GüterslohRegister number:1385Tax number:347/5914/2777


ReactOS Deutschland is an approved non-profit organization under German law for supporting the ReactOS Project.
The organization was founded on 24th January, 2009 by the ReactOS developers Maarten Bosma, Colin Finck, Danny Götte, Matthias Kupfer, Daniel Reimer, Gregor Schneider and Christoph von Wittich.

Board of Directors

  • Matthias Kupfer (President)
  • Daniel Reimer (Vice President)
  • Colin Finck (Treasurer)



ReactOS is an open-source operating system for x86/x64 PCintended to be binary-compatible with computer programsand device drivers made for Windows Server 2003.[3]

Development started in 1996, as Windows 95 clone project, which was in 1998 continued as ReactOS with the incremental addition of features of later Windows versions. ReactOS has been noted as a potential open-source drop-in replacement for Windows[4][5][6] and for its information onundocumented Windows APIs.[7] As stated on the official website, „The main goal of the ReactOS project is to provide an operating system which is binary compatible with Windows … such that people accustomed to the familiar user interface of Windows would find using ReactOS straightforward. The ultimate goal of ReactOS is to allow you to remove Windows and install ReactOS without the end user noticing the change.“[8] As of February 2016, ReactOS is considered alpha software, feature-incomplete but with many Windows applications already working (e.g. Adobe Reader6.0, OpenOffice etc[9]),[10] and therefore recommended by the developers only for evaluation and testing purposes.[11][12]

ReactOS is primarily written in C, with some elements, such as ReactOS File Explorer, written in C++. The project partially implements Windows API functionality and has been ported to the ARM and AMD64 processor architectures.[13]ReactOS, as part of the FOSS ecosystem, re-uses and collaborates with many other FOSS projects,[14][15] most notably the Wine project which develops a Windows compatibility layer for Unix-like operating systems.