From FreeOsZoo

Summary

Operating System	Reactos 0.3.1
Architecture	x86
Creator	User:Ayobayo
Download Size	46 MB
Image Size	200 MB
OS Website	http://www.reactos.org
Published	05 July 2007 (CEST)
Bittorrent link	http://www.oszoo.org/ftp/images/ReactOS-0.3.1.zip.torrent

About ReactOS

ReactOS® is an advanced free open source operating system providing a ground-up implementation of a Microsoft Windows® XP compatible operating system. ReactOS aims to achieve complete binary compatibility with both applications and device drivers meant for NT and XP operating systems, by using a similar architecture and providing a complete and equivalent public interface.

ReactOS is the most complete working model of a Windows® like operating system available. Consequently, working programmers will learn a great deal by studying ReactOS source code and even participating in ReactOS development.

ReactOS has and will continue to incorporating features from newer versions and sometimes even define the state of the art in operating system technology.

In short, ReactOS is aiming to run your applications and use your hardware, a free operating system for everyone!

Please bear in mind that ReactOS 0.3.1 is still in alpha stage, meaning it is not feature complete and is not recommended for everyday use.

QEMU options

After unzipping the image can be run with qemu (from the directory where the image resides):

qemu -serial stdio -boot c -hda ReactOS-0.3.1.img -m 512 -localtime

The -m option sets the amount of RAM you would like qemu to use for it's emulation

ReactOS-0.3.1

ReactOS-0.3.1 with Download Manager

NB: most of this page has been gracefully copied from: the "tar" version of ReactOS-0.3.1