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A free open-source Java tool providing an extensible architecture for the creation of customized knowledge-based applications. Includes documentation, events and publications.
protege.stanford.edu
Ontology Building: A Survey of Editing Tools
Survey of ontology editing tools summarizes more than 50 software tools and provides a brief introduction to the topic. Includes resources.
xml.coverpages.org
OilEd is a free ontology editor supporting DAML+OIL, developed by the University of Manchester. Download available. Latest version supports OWL.
oiled.man.ac.uk
A knowledge modelling Java application developed by the Knowledge Media Institute. Internal model is build as a frame system conformant to OKBC protocol. Version 1.1 supports OWL.
apollo.open.ac.uk
A distributed collaborative environment to browse, create, edit, modify, and use ontologies. Provided by the Knowledge Systems Laboratory of Stanford University.
www.ksl.stanford.edu
OpenCyc is the open source version of the Cyc technology, the world's largest and most complete general knowledge base and commonsense reasoning engine.
www.opencyc.org
Makers of ontology engineering tools for enterprise information integration.
www.ontologyworks.com
An on-line tool that identifies an ontology as OWL Lite, OWL DL, or OWL Full.
phoebus.cs.man.ac.uk
A simple web service allowing to display class and property hierarchies from a DAML or OWL file.
www.daml.org
EON2002 - Evaluation of Ontology-based Tools
Program and Proceedings of OntoWeb-SIG3 Workshop at the 13th International Conference on Knowledge Engineering and Knowledge Management.
km.aifb.uni-karlsruhe.de
WordMap Taxonomy Management Software
Allows an organisation to ensure semantic interoperability of metadata, through consistent terminology in all of its applications, assets and activities.
www.wordmap.com
IBM Ontology Management System
A framework for loading ontologies from files and via the Internet and for locally creating, modifying, querying, and storing ontologies.
www.alphaworks.ibm.com
An on-line tool providing various reasoning services for OWL documents, such as OWL species, consistency checking, satisfiability, entailment test.
www.mindswap.org
A Semantic Web inference engine for developing ontologies and query answering over RDF, RDFS/DAML or OWL.
www.sts.tu-harburg.de
The Chimaera Ontology Environment
A merging and diagnostic ontology environment. It is distributed for external use and has been used in academics and also commercially.
www.ksl.stanford.edu