db4o is an object database available for Java and for .NET, including CompactFramework and Mono. Features include ACID transactions, automatic class schema recognition, query-by-example, S.O.D.A. object querying API, callback methods, memory files, cascade-on-delete, multi-threaded access, and Java Webstart and servlet support.
This development build includes a new embedded Client/Server mechanism that comes with the same performance-and resource-consumption-characteristics as single user local mode. This build has undergone very heavy stress testing on multi-core machines and with large numbers of clients. The core code has been branched, and the 6.4 branch will be maintained to become 'production' and 'stable' quality.
URL: db4o :: Native Java & .NET Object Database :: Open Source