Berkeley DB | Oracle Embedded Database

Berkeley DB - Oracle Embedded Database
Oracle Berkeley DB is a family of open source, embeddable databases that allows developers to incorporate within their applications a fast, scalable, transactional database engine with industrial grade reliability and availability.
Choose Oracle Berkeley DB for
Extreme performance—eliminates the overhead of SQL and interprocess communication
Zero administration—completely embedded within the application and invisible to end-users
Low TCO—being embedded lowers implementation costs, licensing and hardware costs, and ongoing administration costs
High flexibility and control—developers can configure many aspects of Berkeley DB, optimizing it for specific applications

Berkeley DB
Berkeley DB Java Edition
Berkeley DB XML