ReactOS is an effort to create a Free Software replacement for Microsoft Windows(TM) that is compatible with existing hardware and software!(h/t reader bob)
"'Free' as in 'free speech' and as in 'free beer'"
ReactOS is a free and open-source operating system based on the Windows NT architecture design, providing support for existing applications and drivers and an alternative to the current dominant consumer and server operating systems.
There's stuff like Ubuntu...
But you've gotta admire this guy's enthusiastic pitch...
