MongoDB

MongoDB is a cross-platform document-oriented NoSQL database designed to deal with huMONGOus loads of data. By using a special BSON format that implies using JSON-like documents with dynamic schemas instead of traditional table-based relational structure, the technology makes data integration a lot easier and faster for certain kinds of apps. Due to its effectiveness, MongoDB has become the 4th most used database, being adopted as backend by numerous massively-visited websites (Craigslist, eBay, etc.)