duolingo.com – Learn any of 21 languages for free.
Rocket Languages – Must have CMRLS library card. Learn any of 15 languages including American Sign Language, free. There are downloadable audio lessons, tests and games, our pronunciation-perfecting voice recognition tool and more …
International Morse Code – Translator, trainer, decoder, and phonetic alphabet
Merriam-Webster Dictionary – The most trustworthy dictionary and thesaurus of American English, word games, trending words, Word of the Day,
Oxford Dictionaries – Thesaurus, grammar, and word origins.
Rhyme Zone – Includes the functions of a rhyming dictionary, thesaurus, and spelling checker, …
Your Dictionary – Your dictionary the way you want it; definitions you understand.