The Sustainability Maker project, promotes an open innovation, crowd-sourcing, crowd-voting, crowd-funding platform and an online marketplace for Sustainable Solutions. (www.sustainabilitymaker.org – www.innonatives.com). The platform combines a website and mobile application, to connect people who have identified sustainability-related problems with those who like to help to develop creative problem solving solutions, and support their implementation. The SuM project has published on the platform several Design Challenges related to: climate change, energy, resource efficiency, water, food and agriculture/land use, urban environment, waste and recycling; and encourages the innovation community of the Sustainability Maker platform to develop solutions to solve these problems. The ideas/concepts/solutions submitted are voted by the crowd (crowd-voting) and sustainability experts. The best solution(s) can be implemented either by the external actors who formulated the challenge or by other members of the platform and additional stakeholders (e.g. crowd-funding).