COBrA and COBrA-CT: Ontology Engineering Tools

COBrA is a Java-based ontology editor for bio-ontologies and anatomies that differs from other editors by supporting the linking of concepts between two ontologies, and providing sophisticated analysis and verification functions. In addition to the Gene Ontology and Open Biology Ontologies formats, COBrA can import and export ontologies in the Semantic Web formats RDF, RDFS and OWL.