OpenJPA official releases can be downloaded at the Downloads page.

Released binaries can also by accessed from Maven pom.xml files by pointing them to the repository at http://people.apache.org/repo/m2-incubating-repository. An example pom.xml that will use the 0.9.0-incubating release is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<project>
    <modelVersion>4.0.0</modelVersion>
    <groupId>some-project</groupId>
    <artifactId>some-project</artifactId>
    <packaging>jar</packaging>
    <name>My Project</name>
    <version>1.0.0</version>
    <repositories>
	<repository>
	    <id>central</id>
	    <url>http://www.ibiblio.org/maven2</url>
	</repository>
	<repository>
	    <id>apache-snapshots</id>    	   
        <url>http://people.apache.org/repo/m2-incubating-repository</url>
	</repository>
    </repositories>
    <dependencies>
	<dependency>
	    <groupId>org.apache.openjpa</groupId>
	    <artifactId>openjpa-all</artifactId>
	    <version>0.9.6-incubating</version>
	</dependency>
    </dependencies>
</project>

Also, there is a snapshot repository set up for maven located at http://people.apache.org/repo/m2-snapshot-repository/org/apache/openjpa/ where development snapshot jars will be stored. Maven projects can be configured to depend on the openjpa snapshots by setting up their pom.xml as follows:

Update Version

In the example below replace 0.9.8-SNAPSHOT with the version you wish to use. Ex. 1.2.0, or 1.3.0-SNAPSHOT

<?xml version="1.0" encoding="UTF-8"?>
<project>
    <modelVersion>4.0.0</modelVersion>
    <groupId>some-project</groupId>
    <artifactId>some-project</artifactId>
    <packaging>jar</packaging>
    <name>My Project</name>
    <version>1.0.0</version>
    <repositories>
	<repository>
	    <id>central</id>
	    <url>http://www.ibiblio.org/maven2</url>
	</repository>
	<repository>
	    <id>apache-snapshots</id>
	    <url>http://people.apache.org/repo/m2-snapshot-repository</url>
	</repository>
    </repositories>
    <dependencies>
	<dependency>
	    <groupId>org.apache.openjpa</groupId>
	    <artifactId>openjpa-all</artifactId>
	    <version>0.9.8-incubating-SNAPSHOT</version>
	</dependency>
    </dependencies>
</project>