Here are some apps/websites I find very useful when it comes to languages:
- Wordreference: a very complete dictionnary which explains nuances, gives example or word in senteces and propose translation of expressions.
- Linguee: this website is good to see examples of words or expressions in context.
- Memrise: I used it to learn some vocabulary of the dialect spoken where I'm living. I find it playful and very efficient when it comes to memorization. Also, you can create a course for free (basically, you enter your list of vocabulary and learn it through the website/app).
- Le conjugueur du Nouvel Obs (for French conjugation): you entered a verb, and you see all of its forms with a clear presentation.
What about you? Which apps/websites do you use most when learning a language?