The Free/Open Source software (F/OSS) phenomenon has shown a considerable degree of vitality and dynamism in recent years; so much vitality and dynamism, in fact, to deserve the qualification of new institution for knowledge creation. This workshop will review the most salient aspects of the phenomenon from a multidisciplinary perspective, exploring (a) the nature of and the interplay among the relevant actors’ motivations and the way these sustain the F/OSS institutional structure; (b) the governance of F/OSS projects; (c) the cooperative and competitive relationships linking F/OSS communities to commercial actors; (d) intellectual property-related issues; and (e) the debate on the opportunity of providing various forms of government support to F/OSS development. The presentation will aim at opening up the discussion on the viability of F/OSS-like institutional arrangements for domains of knowledge creation different from software.