JanusGraph is a transactional graph DBMS optimized for storing and querying graphs distributed across a multi-machine cluster.
Graph
http://janusgraph.org
https://github.com/JanusGraph/janusgraph/
https://docs.janusgraph.org/latest/
The Linux Foundation
US
2012
Titan
DataStax
Open Source
Java
1010data
Berkeley DB
All OS with Java VM
Apache v2