Freebase es una base de datos social abierta con más de 10.000.000 de conceptos interconectados. El producto pertenece a Metaweb Technologies, empresa creada en 2005 con base en San Francisco. Este es su primer producto. Entre sus usuarios cabe destacar a Bing o Zemanta. Muy interesante para los que trabajan en la creación de contextos web semánticamente enriquecidos.

"Freebase, created by Metaweb Technologies, is an open database of the world’s information. It’s built by the community and for the community – free for anyone to query, contribute to, build applications on top of, or integrate into their websites.

Already, Freebase covers millions of topics in hundreds of categories. Drawing from large open data sets like Wikipedia, MusicBrainz, and the SEC archives, it contains structured information on many popular topics, including movies, music, people and locations – all reconciled and freely available via an open API. This information is supplemented by the efforts of a passionate global community of users who are working together to add structured information on everything from philosophy to European railway stations to the chemical properties of common food ingredients"

By structuring the world’s data in this manner, the Freebase community is creating a global resource that will one day allow people and machines everywhere to access information far more easily and quickly than they can today"