Gateway
Gateway will be a free flying and human tended station in the vicinity of the Moon. This platform is in development through a partnership between ESA, NASA, the Japanese Aerospace Exploration Agency (JAXA), and the Canadian Space Agency (CSA). Gateway will be assembled during this decade.
Gateway provides a staging post for human missions to the Moon and a location in deep space to perform scientific research and to learn how to live and work in space away from Earth, preparing for future missions to Mars and beyond.
More information on Gateway can be found here.