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!
I found this old (July 2006) but useful review of ReactOS...I'm no Operating Systems expert... but I love their smart and pragmatic approach!
They're rebuilding the Windows Kernel from scratch. They realise that Windows NT Architecture is modern, and that NT has learned from and improved upon design flaws in UNIX. So they're incorporating the latest in OS design, and keeping the code lean. (Or at least they're trying to)
Through a windows clone, they lower the cost of switching from MS Windows to ReactOS, while keeping some of Windows' biggest advantages :
- Over 90% of computer users are comfortable & familiar with the Windows user experience (and hence also ReactOS)
- Windows has an amazing eco-system of software and developers writing for the platform.
They also get all the advantages of being Open Source...
Interesting... Definitely more interesting than Linux!
Should Microsoft be worried? Not yet methinks...