I was recently asked the question of where to find well documented case studies of "real world" organizations using Kanban.
LeanKanban University keeps a nice collection of such case studies in their website, but it's interesting to know that the various Kanban conferences they organize around the work (like Lean Kanban North America, or Lean Kanban Central Europe) always include a track featuring case study presentations.
What follows here is a selection of presentations from recent years, attempting to show examples of applications of Kanban in different domains, and various levels of complexity (from Team Kanban to Portfolio and Enterprise Services)
An interactive mind map version of this list (including some notes summarizing each presentation) can be found here.