StudySmarter - Your lecture notes, flashcards, summaries, learning with friends, statistics, and even rewards for learning - all in one place and just a click away - StudySmarter.
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.
Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.
Avokado - Language learning app
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
Repetitions - Repetitions is a cross-platform spaced repetition system (SRS), an intelligent flashcard application that makes learning and memorization easy.