The Greek Free / Open Source Software Society (GFOSS) is a non-profit organization, which was founded in 2008 by 25 Universities, Technological Education Institutes and Research Centers. Our major goal is to promote the use and development of Open Technologies for Education, Public Administration and Business in Greece. We, therefore, aspire to become a knowledge hub and a platform for dialogue on Free Software, Open Content & Open Hardware and their benefits. The major Greek Universities, Research Centers and Technological Institutes are members of the GFOSS, while leading members of the Greek community of Open Technologies users and developers play a major role in the implementation of our actions, through mutual cooperation and active participation. GFOSS is affiliated with Creative Commons and a founding member of COMMUNIA. GFOSS experts share extensive multidisciplinary experience in the development and operation of major transparency and public engagement projects in Greece. These include the projects on electronic deliberation for participatory decision making and open innovation and collaboration contests.