ReactOS was build from the ground up to be completely compatible with any WIN32 application and also with your original Windows NT, XP, 2003 system drivers.
This means that you have a free Windows compatible operating system that you may install and use with your existing software and computer hardware.
It's latest release was made 22 January 2008 - Release Version 0.3.4 Beta
Main Site: ReactOS
Developer Site: ReactOS
Download Page: Download
