MongoDB is a cross-platform document-oriented database system. Classified as a “NoSQL” database, MongoDB eschews the traditional table-based relational database structure in favor of JSON-like documents with dynamic schemas , making the integration of data in certain types of applications easier and faster. MongoDB is free and open source software.
Node.js contains a built-in HTTP server library, making it possible to run a web server without the use of external software.
Download Node.js http://nodejs.org/download/