Applications of a pattern language in designing for change:
http://www.wikipatterns.com/display/wikipatterns/BarnRaising ( are we barn-raising a pattern languages group?)
http://trout.cpsr.org/program/sphere/patterns/ The pattern language projectL Liberating Voices
www.conference.science.org.au/php/papers.php My own pattern from Liberating Voices

Christopher Alexander, Architect and originator of a "pattern language": from Wikipedia

The Timeless Way of Building 1970 described the perfection of use to which buildings could aspire:
“ There is one timeless way of building. It is a thousand years old, and the same today as it has ever been. The great traditional buildings of the past, the villages and tents and temples in which man feels at home, have always been made by people who were very close to the center of this way. It is not possible to make great buildings, or great towns, beautiful places, places where you feel yourself, places where you feel alive, except by following this way. And, as you will see, this way will lead anyone who looks for it to buildings which are themselves as ancient in their form, as the trees and hills, and as our faces are. ”
This book's method was adopted by the University of Oregon, as described in The Oregon Experiment, and remains the official planning instrument. It has also been adopted in part by some cities as a building code.
The Nature of Order: An Essay on the Art of Building and the Nature of the Universe, 2000 which includes The Phenomenon of Life, The Process of Creating Life, A Vision of a Living World and The Luminous Ground, is Alexander's latest, and most comprehensive and elaborate work. In it, he puts forth a new theory about the nature of space and describes how this theory influences thinking about architecture, building, planning, and the way in which we view the world in general. The mostly static patterns from A Pattern Language have been amended by more dynamic sequences, which describe how to work towards patterns (which can roughly be seen as the end result of sequences). Sequences, like patterns, promise to be tools of wider scope than building (just as his theory of space goes beyond architecture).
Among Alexander's most notable built works are the Eishin Campus near Tokyo; the West Dean Visitors Centre [1] in Sussex, England; the Julian Street Inn (a homeless shelter) in San Jose, California (both described in Nature of Order); the Martinez House (an experimental house in Martinez, California made of lightweight concrete); and the low-cost housing in Mexicali, Mexico (described in The Production of Houses).