fabio-rovai / open-ontologies

Rust CLI and MCP server that plans, applies and rolls back changes to an OWL ontology, reporting blast radius and emitting checkable Lean 4 proofs.

microsoft / Ontology-Playground

Free, open-source web app for learning about ontologies and Microsoft Fabric IQ. Explore a catalogue of pre-built ontologies, design your own visually, export as RDF/XML, and share interactive diagrams. Zero backend, fully static.

open-metadata / OpenMetadata

The Open Context Layer for Data and AI , OpenMetadata is the open platform for building trusted data context and business semantics for humans, AI assistants, and agents.

trustgraph-ai / trustgraph

The Semantic Agent Governance Platform

neo4j-labs / neosemantics

Graph+Semantics: Import/Export RDF from Neo4j. SHACL Validation, Model mapping and more.... If you like it, please ★ ⇧

jesstalisman-ia / intentional-arrangement-skos

Build, validate, visualize, and publish SKOS taxonomies in your browser — standards-first, single self-contained file, with a REST API and MCP server.