Anki is designed to help you remember things through repetitive intelligent flashcards - great for learning languages and more.

Anki will make 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. Since it is content-agnostic and supports images, audio, videos, and scientific markup (via LaTeX), the possibilities are endless.

There is a comprehensive Help Manual that can be accessed in-app if you need assistance in setting up your deck, etc.

You can use Anki to help you with:

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

Anki Features:

Synchronization

Use the free AnkiWeb synchronization service to keep your cards in sync across multiple devices
Flexibility

From card layout to review timing, Anki has a wealth of options for you to customize
Media-Rich

Embed audio clips, images, videos, and scientific markup on your cards, with precise control over how it's shown
Optimized

Anki will handle decks of 100,000+ cards with no problems
Fully Extensible

There are a large number of add-ons available.