Protege Desktop

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

The webprotege code base

ROBOT is an OBO Tool

🦉 Snow Owl Terminology Server - a production-ready, scalable, FHIR Terminology Service compliant server that supports SNOMED CT International and Extensions, LOINC, RxNorm, UMLS, ICD-10/11, custom code systems and many others

Openllet is an OWL 2 reasoner in Java, build on top of Pellet.

The EMBL-EBI Ontology Lookup Service (OLS)

Basic and Advanced OBO Graphs: specification and reference implementation

Convert OWL to labeled property graph and import into Neo4J

ONT-API (OWL-API over Apache Jena)

an Ontology SDK

SHACL validation UI, SHACL documentation generator, SHACL generator from RDF.

Java OWL Persistence API

This is the development repository for the STATistics Ontology (STATO). For more information and demonstration on the ontology content, please visit its website:

Python bindings for upgraded FaCT++ description logic reasoner

Create RDF data from Excel spreadsheets - edit SKOS vocabularies, knowledge graph instances, SHACL constraints, OWL ontologies in Excel files. Available as HTTP service, upload form, command-line, or Java API.

Command line tool for ontology engineering

a set of command line tools for OWL files powered by owl-api

Generates RDF4J Vocabulary classes from RDFS or OWL Schemas

An Object Oriented Programming (OOP) interface for Ontology Web language (OWL) ontologies.