fireballrus writes with news of the release of ReactOS 0.3.1 —
press release,
changelog,
download packages. ReactOS is "an open source effort to develop a quality operating system that is compatible with applications and drivers written for the Microsoft Windows NT family of operating systems (NT4, 2000, XP, 2003)." The press release notes: "Please don't forget this is an alpha-stage operating system, which means it is not suitable to replace your main OS. Also, this release is aimed to be run mostly in virtualizers / emulators (like QEmu, VMWare, Parallels, etc): because of the big amount of changes, our development team was not able to test/fix all problems which arise when running ReactOS on real hardware."