CleverDeck - Learn languages more efficiently with spaced repetition

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.

ACT Flashcards from Magoosh - Everything you should have learned in high school

Avokado - Language learning app

Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.

LaTeX Cards - The mobile app to create cards to learn your formulas and theorems using LaTeX.