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. As a result, customers and end-users will experience an application that simply works, reliably manages data, can scale under extreme load, but requires no ongoing database administration. As a developer, you can focus on your application and be confident that Oracle Berkeley DB will manage your persistence needs.....(free).....