A bit out of the scope, since it is an embedded database designed to run on mobile devices, but Realm[1] is a NoSQL database (in this case Object Database) with

A bit out of the scope, since it is an embedded database designed to run on mobile devices, but Realm[1] is a NoSQL database (in this case Object Database) with full ACID transactions, and is running on millions of devices. [1] http://realm.io http://realm.io