apache / age

Graph database optimized for fast analysis and real-time data processing. It is provided as an extension to PostgreSQL.

openlink / virtuoso-opensource

Virtuoso is a high-performance and scalable Multi-Model RDBMS, Data Integration Middleware, Linked Data Deployment, and HTTP Application Server Platform

skaiworldwide-oss / agensgraph

AgensGraph, a high performance transactional graph database based on PostgreSQL