Commons Collaborative Economies: Policies, Technologies and City for the People is a project which aims to highlight the relevance of the commons-oriented approach of peer production and collaborative economy, while proposing public policies and providing technical guidelines to build software platforms for collaborative communities. The project consists in an international event, with a participative focus around co-design of policies for public administrations in this area, and a continuous engagement and knowledge generation process at the community level, where a series of follow-up debates and continuous exploration working together experts, citizens and sector representatives, has resulted for example on a series of proposals and more than 120 policy recommendations for governments, ending in a joint statement of public policies for the collaborative economy.