| Conceptual Graphs Home Page: Features introductory material and bibliography, standard notation, events, projects, tools and researchers. |
| John Sowa on Knowledge Representation: Provides background material and tutorials on ontology and related topics in logic, conceptual graphs, and natural language semantics. |
| Knowledge Interchange Format (KIF): A DARPA project. KIF is a language designed for use in the interchange of knowledge among disparate computer systems. |
| Knowledge Representation Resources: A list of knowledge representation resources, part of the AI Education Repository at the University of Southwestern Louisiana. |
| KR, Inc.: Charitable organization concerned with fostering research and communication on knowledge representation and reasoning. Features conferences, educational materials and mailing lists. |
| Modeling and Simulation: Resources and links published by INSEAD on Knowledge Representation and Exchange, Ontologies, Simulation. |
| Tockit Project: Aims to create a framework for conceptual knowledge processing in terms of social structures and a common code base. Features software description and contact details. |
| WebKB: A set of tools using Conceptual Graphs formalism for building and documentation of knowledge bases, indexing or connecting elements of WWW-accessible documents. |
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