Liberating Structures were invented in the context of Agile and Scum. I use them very frequently in group settings. Liberating Structures are powerful tools to get access to the knowledge, experience and best practice of everyone in the room around a chosen topic. Liberating structures are endlessly combinable and thus can be used for nearly every topic that concerns (business)life.
At this point there are 35 Liberating Structures existing, however, they get constantly developed further.
For more information I invite you to visit the Liberating Structure Website: http://www.liberatingstructures.com