The cooperative content sourcing and publication platform WITH targets the creative and cultural industries, aiming to increase the use and re-use of digital cultural content that is available through a variety of sources. The platform addresses all the stakeholders of these industries, from content holders and producers, to application and service developers, scholars and normal users. WITH offers services that facilitate the discovery of cultural resources that meet users' criteria in order to be collected and re-used for artistic creation, promotion of innovation and showcasing of the social and economic value of cultural material. It has evolved through a series of hackathons, workshops and seminars in the framework of EC-funded projects such as Europeana Space , which aimed to produce new applications and services based on published resources through the use of the platform's programmatic interfaces (APIs). These interactions led to the intuitive integration of linked data principles and related services that can enhance and enrich available web resources, as well as to the development of a complete annotation and crowdsourcing infrastructure that is aligned with the efforts of W3C’s Open Annotation Community Group.