RDFLib is a Python library for working with RDF, a simple yet powerful language for representing information.

A distributed knowledge graph store

A curated list of various semantic web and linked data resources.

Apache Jena, A free and open source Java framework for building Semantic Web and Linked Data applications.

SPARQL graph database

Blazegraph High Performance Graph Database

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

Library extending Jupyter notebooks to integrate with Apache TinkerPop, openCypher, and RDF SPARQL.

Ontop is a platform to query relational databases as Virtual RDF Knowledge Graphs using SPARQL

INCEpTION provides a semantic annotation platform offering intelligent annotation assistance and knowledge management.

EasyRdf is a PHP library designed to make it easy to consume and produce RDF.

Graph Data Science: an abstraction layer in Python for building knowledge graphs, integrated with popular graph libraries – atop Pandas, NetworkX, RAPIDS, RDFlib, pySHACL, PyVis, morph-kgc, pslpython, pyarrow, etc.

Information Integration Tool

A wrapper for a remote SPARQL endpoint

🔗 Semantic MediaWiki turns MediaWiki into a knowledge management platform with query and export capabilities

(subjective) overview of projects which are related both to python and semantic technologies (RDF, OWL, Reasoning, ...)

The low-code Knowledge Graph application platform. Apache license.

This is the core development repository for BrightstarDB.

Very fast SPARQL Engine, which can handle very large knowledge graphs like the complete Wikidata, offers context-sensitive autocompletion for SPARQL queries, and allows combination with text search. It's faster than engines like Blazegraph or Virtuoso, especially for queries involving large result sets.

📬 A knowledge graph querying framework for JavaScript