Oracle Berkeley DB provides the best open source embeddable databases allowing developers the choice of SQL, Key/Value, XML/XQuery or Java Object storage for their data model. At its core is a fast, scalable, transactional database engine with proven reliability and availability. Berkeley DB comes three versions: Berkeley DB, Berkeley DB Java Edition, and Berkeley DB XML.
Eliminates overhead while providing the flexibility to tailor the database to your requirements
All administration is performed via an API and hidden from the end user, no DBA required
Great for mobile devices with static library size less than 1MB and runtime dynamic memory requirements of only a few KB
An embedded database lowers total cost of ownership with lower implementation and administration costs, and can lower licensing and hardware costs