owlapi

A package for ontology engineering with deep learning and language models.

Python bindings for upgraded FaCT++ description logic reasoner

A Common Lisp Framework for the Semantic Web

OWLunit allows you to define and run unit tests for ontologies.

A Java project exploiting Java Debug Interface and OWL API to reason on active instances of a running java application.

An MCP (Model Context Protocol) server for Protégé Desktop: exposes the live, active ontology to MCP clients (Claude Code, Codex, …) and edits it through Protégé's shared OWLModelManager — plus an in-Protégé AI chat assistant.

Spark-based OWL reasoner

Tools to support ontology development using git

Neuro-symbolic hypothesis generation platform combining knowledge graph embeddings, GAN-based generation, and OWL/HermiT validation.

A Python implementation of the Functional OWL (OFN) object model.