The success of cities is linked to their efficiency, in reducing transaction costs and providing services. However, in order to maintain this success, cities have reinvented themselves many times through history.Today, Information Technologies are doomed to be the key driver of a new wave of innovation in cities that will lead, one more time, to their reinvention.However, public procurement and management in cities are not geared to fostering innovation. Therefore, this process of reinvention of transformation of cities into Smart Cities necessarily means to rethink how innovation is managed in cities.Even if Open Innovation is the ¿de facto¿ standard in innovation management in the private sector, we know little of how to apply it to the public sector and this is even truer when involving technological platforms, especially in aspects such as governance or incentives.This project aims to explore this gap with four main objectives:1)\tDistil insights and best practices on how to apply Open Innovation in the Public Sector.2)\tGain understanding on the management of Technological Platforms in an Open Innovation context.3)\tValidate the use of pan-European Platforms for Crowdsourcing, Open Data, FTTH networks and Open Sensor Networks.4)\tTrigger the development of Advanced Future Internet Services.by leveraging existing tools, trials and platforms in Crowdsourcing, Open Data, Fiber to the Home and Open Sensor Networks in five major European cities: Berlin, Amsterdam, Paris, Barcelona and Helsinki.