* [pgGraph v0.1.0](https://github.com/Evokoa/pgGraph) – PostgreSQL extension that builds a derived graph index and enables graph search, traversal, and shortest-path queries over ordinary tables.

* [Kappa Graph (G) v0.15.0](https://github.com/aaronsb/knowledge-graph-system) – Semantic knowledge graph extracting concepts from documents, measuring grounding strength, and preserving source provenance and disagreement.

* [Graph Explorer v3.0.3](https://github.com/aws/graph-explorer) – React-based web app for visualizing property and RDF graphs and exploring connections without writing graph queries.