Object-Relational Persistence

Hibernate - Relational Persistence for Java and .NET
Hibernate is a powerful, high performance object/relational persistence and query service. Hibernate lets you develop persistent classes following object-oriented idiom - including...
iBATIS Data Mapper framework
The iBATIS Data Mapper framework makes it easier to use a database with Java and .NET applications. iBATIS couples objects with stored procedures or SQL statements using a XML desc...
Apache Cayenne - Object Relational Mapping, Persistence and Caching
Apache Cayenne is an open source persistence framework licensed under the Apache License, providing object-relational mapping (ORM) and remoting services. With a wealth of unique a...
Speedo
Speedo is an open source implementation of the JDO(TM) 1.0.1 specification. It is hosted by ObjectWeb. Speedo main benefits Possible choice of optimistic or pessimistic trans...
pBeans - Persistence Layer Object Relational Mapping for Java
pBeans is a Java persistence layer and an object/relational database mapping (ORM) framework. It is designed to be simple to use and automated. The idea is that you save time an...
JDBM
JDBM is a transactional persistence engine for Java. It aims to be for Java what GDBM is for other languages (C/C++, Python, Perl, etc.): a fast, simple persistence engine. You can...
Jaxor
Jaxor is a code-generating OR mapping tool which takes information defined in XML relating to the relational entities to be mapped and generates classes, interfaces and finder obje...
JPOX
JPOX is a free and fully compliant implementation of the JDO1, JDO2 specifications, providing transparent persistence of Java objects. It supports persistence to all of the major R...
Apache Torque
Torque is an object-relational mapper for java. In other words, Torque lets you access and manipulate data in a relational database using java objects. Unlike most other object-rel...
Bhavaya
Bhavaya is a Java library that provides real-time and up-to-date access to database data. It contains a persistence layer that inflates and maintains Java objects from database dat...