MongoDB (from "humongous") is an open source document-oriented database system developed and supported by 10gen. It is part of the NoSQL family of database systems. Instead of storing data in tables as is done in a "classical" relational database, MongoDB stores structured data as JSON-like documents with dynamic schemas (MongoDB calls the format BSON), making the integration of data in certain types of applications easier and faster.
10gen began development of MongoDB in October 2007. The database is used by MTV Networks, Craigslist, Foursquare and UIDAI Aadhaar. MongoDB is the most popular NoSQL database management system.
Binaries are available for Windows, Linux, OS X, and Solaris.