The Governance Platform for Agents, Knowledge, and Context
Ontologies GitHub Repositories (2026) · Open Source Tools
Discover the best Ontologies open source repositories on GitHub. Explore trending tools, live star counts, source code, and developer projects updated daily.
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.
Open-source data management for multimodal AI. Query, trace, and govern with a lineage-native, format-agnostic lakehouse for agents and teams. Supports biological formats and registries - by the creators of Scanpy. 🍊YC S22
The Common Core Ontology Repository holds the current released version of the Common Core Ontology suite.
The EMBL-EBI Ontology Lookup Service (OLS)
Dialog is an embeddable database designed for local-first software.