An Object-Relational mapping tool. Generate persistent enable Java source from Class Diagram or ERD. A diagram editor is provided. It can generate code for client applications and server side applications. [Commercial]

An object persistence layer written in Java which uses a relational database to provide persistent storage, whilst shielding programmers from the details of relational database access. [Open Source, GPL]

Charles Chan demonstrates OJB, an open source Java object persistence framework.

Object/Relational mapping tool, with customized mappings for each major EJB server (including JBoss). [Commercial]

Simple and lightweight Object/Relational mapping and persistence framework. Configuration is stored in XML files and code generation relies on Apache velocity templates. [Open Source, Apache]

The ObjectWeb open source adaptable persistence service. It is used to offer CMP 2.0 for the JOnAS server, as well as Speedo, a JDO implementation. [Open source, LGPL]

Provides an Object/Relational mapping tool with a persistence layer. Also features an introduction to Object/Relational mapping. [Commercial]

A cross-platform solution for transactional persistence of Java objects . By Software Tree, Inc. [Commercial]

A Java library and a set of tools that can be used for storing and retrieving Java objects in a relational database. [Open source, BSD license]

An Object-Relational Mapping Framework with a GUI Editor that lets you automatically create Java objects that map to relational databases. [Open Source, Mozilla-like]