Established in 2007 as a non-profit organisation, OW2 is a “community of communities”. Our mission is to make freely available a portfolio of open source software for enterprise information systems in domains such as middleware, open cloud, big data, BPM, security and privacy, software engineering, collaboration, etc. The OW2 code base hosts dozens of open source projects such as ASM, AuthzForce, CLIF, DocDoku, FusionDirectory, GLPI, JORAM, Knowage, LemonLDAP:NG, Lutece, OCS Inventory, Petals ESB, Prelude, ProActive, Rocket.Chat, SAT4J, SeedStack, Sympa, Telosys, Waarp, WebLab and XWiki. OW2 was one of the exhibitors at FOSDEM in 2017, 2018 and 2020. In our experience, our stand operates as a focus for our members, contributors and anybody who wishes to reach out to us. As explained on our website, seven projects from our code base participated last year. Each project contributed in running our stand alternately during the two days of FOSDEM, making it a very busy and lively exhibition space. This year the virtual booth will again be shared between project leaders who will take turn to answer questions, chat with visitors and run project demonstrations. In 2021, OW2’s drive to contribute to the sustainability of the European open source ecosystem will be illustrated by two recently launched initiatives: one is the analysis of open source project’s Market Readiness Levels, the other the OW2 OSS Good Governance initiative a framework for appropriate usage of open source software.