Availability : Open Source.
Written in : Java.
It supports the Blueprints and RDF/SPARQL APIs, which is an ultra-scalable, high-performance graph database.
It allows the processing up to 50 Billion edges on a single machine.
Native graph database with High Performance.
Apache TinkerPop API or RDF/SPARQL.
Single machine data storage to ~50B triples/quads (RWStore).
REST API with embedded and/or webapp deployment (NanoSparqlServer).
Reusable named subqueries.