FIWOO is a data-driven Internet-of-Everything platform for European cities to enable large scale co-creation, testing and validation of urban IoE apps and services. It is currently under development by the four Spanish companies Bosonit, Emergya, JIG, and Secmotic in response to the Request for Tenders from the SELECT for Cities project (GA 688196). FIWOO is based on FIWARE and other open source technologies, following the latest European open standards for Smart City Platforms in terms of communication protocols, data management, access control, security, robustness, and interoperability. Visit our webpage at www.fiwoo.eu and follow us on Twitter @FIWOO_city