Linux has been promoted as the free alternative to Microsoft Windows. Despite years of heavy promotion by its dedicated fans, Linux still remains a competitor to Windows only for server machines but looses ground when it comes to desktop computers. Linux started to gain some ground on the desktop computer front, yet it still has a long way to go.
The two main obstacles facing Linux when trying to gain ground in the desktop area are first that a large number of users are already familiar with using Windows and second because there is a huge amount of software applications that run on Windows yet does not run on Linux.
Enter ReactOS. ReactOS attempts to become an open source alternative to Microsoft Windows. An alternative in the real sense of the word, that is it can run all software applications that have been developed for Windows! That's a freakingly interesting idea. If they succeed in achieving their goal, I believe that could deal a heavy blow to the Windows operating system. I wonder then how will Microsoft React.