Java Persistent Objects JDO (JPOX) is a Java Data Objects (JDO) API fully-compliant implementation of the JDO 1 specification, as well as implementing the majority of the JDO 2 specification. The Java Data Objects (JDO) API is a standard interface-based Java model abstraction of persistence. JPOX is free and released under an OpenSource license (Apache 2), and so the source code is available for download along with the JDO implementation.

Support is provided by way of a Forum at http://www.jpox.org.