Freely redistributable implementation of X11 The XFree86 Project, Inc is a non-profit organisation that produces XFree86. XFree86 is a freely redistributable implementation of the X Window System that runs on UNIX(R) and UNIX-like operating systems (and OS/2). The XFree86 Project has traditionally focused on Intel x86-based platforms (which is where the `86' in our name comes from), but our current release also supports other platforms. One of our current goals is to increase the range of platforms that XFree86 runs on.