mongoDB

Purpose:

MongoDB (from “humongous”) is an open-source document database, and the leading NoSQL database. Written in C++

MongoDB eschews the traditional table-based relational database structure in favor of JSON-like documents with dynamic schemas (MongoDB calls the format BSON), making the integration of data in certain types of applications easier and faster. Released under a combination of the GNU Affero General Public License and the Apache License, MongoDB is free and open-source software.