Scriba is a great tool to learn Latin. It features : - Lewis and Short's Latin-English dictionary (5 000 entries in the free version, more than 50 000 in the full version, through paid add-on) - declensions and conjugations of all the entries - a Latin word parser - an English-Latin lexicon (free version) - Smith & Hall's English-Latin Dictionary (paid version) - Allen & Greenough's New Latin Grammar - a Document reader which allows you to look up words in the database - Flashcards to learn new words