Current Applications of Pattern Languages

Global Village Constructor Set Pattern Language for Open Source Ecology

Group Pattern Language at the Group Works Project

Liberating Voices Pattern Language for the Public Sphere Project

Patterns in Federated Wiki by Michael Mehaffy

Scrum (Organizational) Patterns by the Scrum Patterns Community

Transition as a Pattern Language in the Transition Movement

In addition, there are some communities exploring Federated Wiki.

The Hidden History of Online Learning led by Mike Caulfield