Google Translate - Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.
Anki - Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.
Mate Translate - Ultimate translation app for Mac, iOS, Chrome and many more
Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.
Veed - Translate Video - Automatically translate any video into any language online.
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.