Anki - powerful, intelligent flashcards

Anyone who needs to remember things in their daily life can benefit from Anki. Since it is content-agnostic and supports images, audio, videos and scientific markup (via LaTeX), the possibilities are endless. For example:

Learning a language
Studying for medical and law exams
Memorizing people's names and faces
Brushing up on geography
Mastering long poems
Even practicing guitar chords!