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.

Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.

Cram - Cram is an app for Android, Windows and Apple devices that allows you to search for flashcards in a range of topics to study for an upcoming test or to learn new information. Read more about Cram.

RemNote - All-in-One Tool For Thinking & Learning

Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

The Mnemosyne Project - Mnemosyne (named for the Greek goddess of memory, Mnemosyne) is spaced repetition software...