InfoGrid is an open-source internet graph database. Unlike a relational database, InfoGrid represents information as nodes and edges that relate nodes. Nodes can carry properties and can be dynamically blessed with types and unblessed. InfoGrid can be run on a variety of storage backends, including MySQL, PostgreSQL and NoSQL. InfoGrid also provides a REST-ful web frontend, user-centric identity technology, and a Probe framework for the seamless integration of external data sources