FIWARE is an open source platform for building smart applications and solutions for smart cities. It provides common data models and APIs to allow vertical solutions and third party apps to access and share city data and platform services. Case studies demonstrate how FIWARE enables smart parking and multi-city dashboards using its core Orion Context Broker component and NGSI APIs. FIWARE aims to make cities smarter through its open, interoperable approach and large community of cities, startups and other stakeholders collaborating around its standards.