Lexicons for English
Levin, B. (1993). English verb classes and alternations: a preliminary investigation. Chicago (Ill.): University of Chicago press. Partial view on Google Books is available.
VerbNet The largest online verb lexicon in English.
FrameNet Online lexical resource in English.
WordNet A lexical database for English.
WordNet Bibliography maintained by Andras Csomai Comprehensive bibliography listing research related to Wordnet lexical database.
The Global WordNet Association A platform that connects wordnets all over the world.
English Lexicon Project A database whose function (among others) is to generate lists of words with specific lexical characteristics.
Experimental NLP lexicons (inactive) This site includes CoreLex, an ontology that implements the assumptions of Pustejovsky's Generative Lexicon theory
Roget’s Thesaurus electronic version Roget's Thesaurus of English Words and Phrases is organized into categories of thinking.
Verbs, semantic classes and semantic roles in the ADESSE project José M García-Miguel Francisco J Albertuz University of Vigo. An introduction to Adesse, a verb lexicon for Spanish.
Adesse Verb lexicon for Spanish maintained by the University of Vigo
Spanish FrameNet Online lexical resource in Spanish
Spanish and Catalan WordNets Spanish and Catalan Wordnets maintained by the Technical University of Catalonia
3LB: Building a syntactic-semantic-trees-based database Project that plans to create treebanks for Spanish, Basque and Catalan.