Current release
The last release of X.Org was X11R7.5, on October 26, 2009. This release added among others Multi-Pointer X (MPX), RandR 1.3, E-EDID support and DRI2. Read more in the Release Notes.
Download: mirrors, master site.
General
Individual releases of Xorg modules are here.
6.8.0 post-partum: lessons learned.
For module maintainers: HOWTO Make a release.
Old releases
X.Org 7.4 (Released: 2008-09-23) Release Notes
Download: mirrors, master site.
X.Org 7.3 (Released: 2007-09-06) Of note, this release added RandR 1.2 and input hotplug support.
Download: mirrors, master site.
X.Org 7.2 (Released: 2007-02-15) Of note, this release added autoconfiguration support, and enhanced support for GL-based compositing managers, such as Compiz and Beryl.
Download: mirrors, master site.
X.Org 7.1 (Released: 2006-05-22) Release Notes
Download: mirrors, master site.
X.Org 7.0 (Released: 2005-12-21)
Download: mirrors, master site.
For more complete information, including a release history, please see the historical releases page.