Annotated Ontology Resources: Linguistics Oriented
- A lexical reference system that provides links among synonym sets
- Search for relationships between words, concepts and people.
Web Thesaurus Compendium - Alphabetical
- Index of thesauri on the web
Reference Resources on the Web: Dictionaries & Thesauri
- Thesauri on the Net
- An ontology for natural language processing
ThoughtTreasure home page
- A project that combines natural language and common sense capabilities
The Generalized Upper Model 2.0
- A general linguistically motivated ontology. It has been conceived as a standardized top level ontology for NLP applications.