OntoMerger is an ontology alignment library for deduplicating knowledge graph nodes that represent the same domain.

Public static website for the D3FEND project. For the D3FEND ontology repo see: https://github.com/d3fend/d3fend-ontology

The Semanticscience Integrated Ontology (SIO) provides a simple, integrated ontology of types and relations for rich description of objects, processes and their attributes.

The eProcurement Ontology provides the formal, semantic foundation for the creation and reuse of linked open data in the domain of public procurement in the EU.

Medical action ontology

Evidence & Conclusion Ontology development site: Use ISSUES to request terms. See WIKI for how to request terms. See README for how to cite ECO. Visit our website for more project info.

GSSO is the Gender, Sex, and Sex Orientation ontology, including terms related to gender identity and expression, sexual and romantic identity and orientation, and sexual and reproductive behavior.

The source of the W3C Linked Building Data Community Group website https://w3c-lbd-cg.github.io/lbd/

Tool to transform an ontology diagram into OWL code.

PAV - Provenance Authoring and Versioning ontology

Ontologies of Linguistic Annotation. Machine-readable tagsets and annotation schemata for more than 100 languages.

A flexible ontology for the interoperability of music metadata

Ontologies focused on scientific observations and scientific workflow provenance.

An ontology designed for oil and gas, and subsurface energy data based on the industry standards.

Repository for the maintenance of the schema.org accessibility property values for discoverability.

CWRC ontology - primary repository

Microsoft/InKnowWorks Graph Engine

Food Ontology (http://purl.org/foodontology#)

Unofficial ontologies for Official Registers of Russian Federal Tax Service

Ontology of algorithms for analyzing biological models, their parameters, and their outputs