Create your own course to memorize anything you want. Flashcard-based, with text formatting, with images, with multiple flashcard types.
Spaced-repetition app, focused on ease and speed of creating own courses, with flashcard formatting (LaTeX, image insertion) and cloze deletion flashcards.
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.
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
AnkiDroid - Memorize anything with AnkiDroid!
Anki Decks - Effortlessly Generate Anki Flashcards - From Any File or Text within Seconds. Simply Upload Your File -> Generate Flashcards -> Start Studying! Saves hours of manual flashcard creation and is perfect for medical students.
RemNote - All-in-One Tool For Thinking & Learning