Anki is a spaced repetition flashcard program. Anki is the Japanese word for memorization.

Duolingo is a freemium language-learning platform that includes a language-learning website and app.

Lingvist is an adaptive language-learning platform.

Mnemosyne is a free flash-card tool which optimizes your learning process.

Readlang will translate webpages you don't understand, and create flashcards and word lists for you.

SuperMemo is a learning method and software.

Busuu is a social network for learning languages.

Learning with Texts (LWT) is a tool for Language Learning, inspired by Stephen Krashen's principles in Second Language Acquisition.

Memrise is a Language learning Platform with a website and iOS and Android Apps.

Quizlet makes simple learning tools that let you study anything.

Rosetta Stone is a cloud-based solution to help all types of learners read, write, and speak more than 30 languages.