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.
Printable Worksheets and Flashcards for fun learning.
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.
Discovery FlashCards - Discovery FlashCards is a unique free program that can help you study.
Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.
Kartka - Kartka is a flash card learning tool with real-time sync, spaced repetition algorithm, and a modern and friendly interface.
AnkiDroid - Memorize anything with AnkiDroid!
Printables - Free printable templates for your mobile sketching