In 2010, the Neo4j.rb JRuby bindings for the Neo4j graph database underwent two releases, with version 0.4.1 introducing migrations and a batch inserter for large data volumes, improving traversal performance and adding relationship indexing options. The neo4jr-simple wrapper was also released in late 2009, providing a simple interface to Neo4j, and is currently available in version 0.2.1. These developments were made possible by the contributions of many individuals, including Andreas Ronge and Matthew Deiters.