Use one app to look up any Greek or Latin word: Logeion was developed at the University of Chicago to provide simultaneous lookup of entries in many classical dictionaries. In addition, for frequent words, some frequency and collocation information is given plus examples from the corpus at perseus.uchicago.edu.

• Liddell and Scott's Greek-English Lexicon (1940)
• DGE (Diccionario Griego–Español). In progress; up to έξαυος.
• Slater's Lexicon to Pindar (1969)
• Woordenboek Grieks/Nederlands (in progress).

• Lewis and Short, Latin-English Lexicon (1879)
• The Dictionary of Medieval Latin from British Sources, ed. R. E. Latham, D. R. Howlett, & R. K. Ashdowne (London: British Academy, 1975-2013)

The app draws data from the following Greek and Latin textbooks.
• Frieze (rev. Dennison) Vergil’s Aeneid Books I-XII, with an Introduction, Notes, and Vocabulary
• Greek: An Intensive Course, by Hardy Hansen and Gerald M. Quinn
• Reading Greek: Grammar and Exercises, by Joint Association of Classical Teachers
• Learn to Read Greek, by Andrew Keller and Stephanie Russell
• Learn to Read Latin, by Andrew Keller and Stephanie Russell
• Introduction to Attic Greek (2nd edition), by Donald Mastronarde
• Wheelock's Latin, by Frederic M. Wheelock and Richard A. Lafleur
• Basiswoordenlijst Latijn [Basic Latin Vocabulary], by J.K.L. Babeliowsky, D. den Hengst, W. Holtland, W. van Lakwijk, J.Th.K. Marcelis, H. Pinkster, J.J.L. Smolenaars, Staatsuitgeverij (NEW: English translations of the example sentences)