ORM framework based on JavaBeans extension
Apache Cayenne is a powerful, full-featured, and open source Java framework, plus developer tools, that provides Object Relational Mapping (ORM) and remoting services for persistence. The software is licensed under the Apache License.
Lightweight Object Relational Model (ORM) for persisting objects to SQL databases.
POJava Persistence is a small library of tools used in the persistence and retrieval of data to and from storage, such as to a database or XML document. It contains an ORM (Object Relational Mapping) tool that supports use of existing beans and POJO's rather than requiring POJO's to be instrumented to support a tool.