Databases and Persistence

GUI admin tool for JDBC databases. Allows querying (guided or plain SQL), meta-querying, Java code generation. [Open Source, GPL]

An object oriented report writer/generator for applications written in Java. [Commercial]

Java packages for transferring data between XML documents and relational databases. [Open Source, Public Domain]

An object store implemented in Java. [Open Source, BSD style]

A Java-based, experimental relational database representing functions as infinite tables. [Open Source, LGPL]

Multi-client / multi-threaded SQL relational database management system written in Java. Includes JDBC 2.0 driver. [Open Source, GPL]

An embeddable datastore with data compression, global transactions, integrity preservation, high concurrency, and flexible, extensible data model. [Commercial]