Ontology Playground (Preview) – microsoft/Ontology-Playground
Summary
Ontology Playground is a free, open-source web application for learning about ontologies and Microsoft Fabric IQ. It offers an interactive Cytoscape.js graph, an ontology catalogue with official and community ontologies, a visual designer, RDF/XML import/export, an embeddable widget, and an Ontology School with interactive courses and quizzes. The project emphasizes zero backend dependencies, multiple deployment options, and AI-assisted coding support.