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 opensource, but counts primitives (number of nodes,relationships & properties). If you are using it for commercial use. And does not have any straight forward information of pricing on official website. so there can be potential vendor lock-in (Although I have just started my company, and don't have budget to spent money on software anyway.) so It is out of option.

Regards,

question from:https://stackoverflow.com/questions/1754628/graph-database-in-java-other-than-neo4j

Answer 1

OrientDB (old link) appears to support graph storage in much the same was as Neo4j