Graph Database in Java (other than Neo4J)

Question

Greetings,
Is there any open source graph database available other than Neo4J??

NOTE: Why not Neo4J?
Neo4J is openso

Answer 1

Well, Neo4j is Open Source under the GPLv3 for the Community Edition and AGPL for the Advanced and Enterprise editions.

For more info, please look at http://neo4j.org/licensing-guide/

/peter neubauer, part of the Neo4j team.