Gremlin3 is now apart of Apache and nearly every graph vendor supports TinkerPop3 (or in the process of migrating to TinkerPop3). http://tinkerpop.incubator.apache.org/ Next, with TinkerPop/Gremlin you not only get a language but a virtual machine that can execute other languages (e.g. SPARQL) http://www.datastax.com/dev/blog/the-benefits-of-the-gremlin... . The virtual machine executes over OLTP graph databases (Titan, Neo4j, OrientDB, etc.) and over OLAP graph processors (Spark, Giraph, etc.).