- Lexical Freenet
- Search for relationships between words and concepts that might never have occurred to you before.
- Thinkmap Visual Thesaurus
- Interactive dictionary and thesaurus using a visual display for data navigation.
- WordNet - a Lexical Database for English
- An on-line lexical reference system whose design is inspired by current psycholinguistic theories of human lexical memory. English nouns, verbs, adjectives and adverbs are organized into synonym sets, each representing one underlying lexical concept. Different relations link the synonym sets. From the Cognitive Science Laboratory, Princeton University