StelsMDB is a MDB JDBC type 4 driver that allows you to perform SQL queries and other JDBC operations on Microsoft Access database (versions 2000-2010) files. The driver is completely platform-independent and does not require installing additional client or server software to provide access to MDB files. It can be effectively used to create, process, and export Microsoft Access databases in your Java applications. It supports most keywords of ANSI SQL'92, supports inner and outer table joins, supports CREATE, INSERT, UPDATE, and DELETE statements, supports transactions, and supports aggregate, numeric, string, conversion, and user-defined SQL functions.
JSDAI is a toolkit around STEP or ISO 10303, the STandard for the Exchange of Product model data. It supports the Express data modelling language as defined in ISO 10303-11 and provides data exchange capabilities according to ISO 10303-21 STEP-file and ISO 10303-28 STEP-XML. JSDAI Runtime is an API according ISO 10303-22, the Standard Data Access Interface (SDAI) for the Java programming language, ISO 10303-27. JSDAI Developer is for the development of Express data models, including Express-G diagrams.
The Envers project makes it simple to version (JPA) entities. The only thing required is annotating them with @Versioned. Storing historical data (versions) is completely transparent to the developer, and the entities may be handled as always. Not only basic properties of an entity can be versioned, but also relations, making it possible to view parts of the database as they were at a given revision. Moreover, Envers provides a straightforward interface for retrieving historical data, a criteria-like query interface, and the possibility to store additional information alongside each revision.