Anki
A flashcard program that schedules reviews based on the user's recall rating.
About Anki
Anki is a flashcard program that focuses study time on challenging material and reduces time spent on material already known.
What you can do
Schedules the next flashcard review according to the user's recall rating.
Synchronizes cards across devices through the free AnkiWeb service.
Supports audio, images, video, and scientific markup in flashcards.
Lets users change flashcard layouts and review timing.
Supports add-ons that extend the program with new features.