OpenGrid is an open source project that allows users to explore and query public open data from various sources through a single interface. It was originally created in Chicago to provide situational awareness across multiple city departments. WindyGrid, used by Chicago's emergency center, is now built on the OpenGrid codebase while using additional private data. OpenGrid is deployed on Amazon Web Services and is available on their marketplace so other cities and organizations can easily deploy it alongside tools like Plenario that aggregate open data from various portals.