Created by the founders of DoubleClick, MongoDB is another popular open source NoSQL data store. It stores structured data in JSON-like documents with dynamic schemas called BSON (for Binary JSON). MongoDB has been adopted by a number of large enterprises, including MTV Networks, craigslist, Disney Interactive Media Group, The New York Times and Etsy. It is available under the GNU Affero General Public License, with language drivers available under an Apache License. The company 10gen offers commercial MongoDB licenses.