The X.Org Foundation X11R6.9 is an Open Source version of the X Window System that supports several UNIX(R) and UNIX-like operating systems (such as Linux, the BSDs and Solaris x86) on Intel and other platforms.
See the Copyright Notice.
The sources for X11R6.9 are available from http://wiki.x.org
X11R6.9 builds on most architectures supported by OpenBSD. See section Building on other architectures for details.