The X.Org project provides an open source implementation of the X Window System. The development work is being done in conjunction with the freedesktop.org community. The X.Org Foundation is the educational non-profit corporation whose Board serves this effort, and whose Members lead this work.
The current X.Org release is X11R7.6. The next major release will be X11R7.7. Information about all releases is available. (Important: If you have an older release, please see the SecurityPage for information on security updates.)