From the webpage:http://unqlite.org/features.html#self_contained
UnQLite is a in-process software library which implements a self-contained, serverless, zero-configuration, transactional NoSQL database engine. UnQLite is a document store database similar to MongoDB,Redis, CouchDB etc. as well a standard Key/Value store similar to BerkeleyDB,LevelDB, etc.
UnQLite is an embedded NoSQL (Key/Value store and Document-store) database engine. Unlike most other NoSQL databases, UnQLite does not have a separate server process. UnQLite reads and writes directly to ordinary disk files. A complete database with multiple collections, is contained in a single disk file. The database file format is cross-platform, you can freely copy a database between 32-bit and 64-bit systems or between big-endian and little-endian architectures. UnQLite features includes:
Does this have the look and feel of a “…just like a Camry…” commercial? 😉
In case you have been under a rock: 2013 Toyota Camry TV Commercial – “Remote”
Still, you may find it meets your requirements better than others.