Dictionary that offers definitions, synonyms, antonyms, example sentences, pronunciations, and translations between English and several languages (German, Dutch, French, Italian, Portuguese, and Spanish). Many other options.
Play 20 questions again the computer in English, Japanese, German, Portuguese, Arabic, French, Spanish, Russian, Hebrew, Chinese, Italian, Korean, Turkish, or Dutch.
Verbix on-line verb conjugator supports verb conjugation in numerous languages: Spanish, French, Italian, Dutch, Danish, and more. Online version of 500 Conjugated Verbs book series (unaffiliated with books).
This free tool allows you to create hypermedia glosses including text, pictures, videos, audio. It is available in many languages. A.k.a. FLAn: foreign language annotator.
Created by Dr. Thom Thibault, who is very active in CALICO