machine-readable dictionaries

• which words are more frequently used?
  • ANC (American National Corpus) (easy to use, just a single file)
  • SCOWL (Spell Checker Oriented Word Lists)
  • COCA (Corpus of Contemporary American English) $$$
  • Google Ngram Viewer? [2] [3]
  • BNC (British National Corpus)
  • more
• pronouncing dictionaries
  • IPhOD (Irvine Phonotactic Online Dictionary)
  • CMU Pronouncing Dictionary
• more

specific projects/work products

• WordNet
• FrameNet
• Lexical Markup Framework
• Universal Networking Language
• ThoughtTreasure
• Linguistic Data Consortium payware

Wikipedia background

• computational lexicology
• machine-readable dictionary (lexicography)
• Category:Lexical databases
• Category:Word-sense disambiguation
• linguistics frequency list
  • Wiktionary:frequency lists
• corpus linguistics
  • text corpus