Anki
Open Source
Anki is a spaced repetition flashcard program. Anki is the Japanese word for memorization.
Rosetta Stone
Commercial
Rosetta Stone is a cloud-based solution to help all types of learners read, write, and speak more than 30 languages.
Readlang
Freemium
Readlang will translate webpages you don't understand, and create flashcards and word lists for you.
Lingvist
Free
Lingvist is an adaptive language-learning platform.
BABADADA.com
Free
BABADADA.com is a visual dictionary platform.
Memrise
Freemium
Memrise is a Language learning Platform with a website and iOS and Android Apps.
AnkiApp
Commercial
AnkiApp is a flashcard app for iOS (iPhone + iPad), MacOS, and Android.
Busuu
Freemium
Busuu is a social network for learning languages.
VocApp.com
Free
VocApp.com is a vocabulary improvement software platform.
Babbel
Commercial
Babbel is a subscription-based language learning app and e-learning platform.
Compare Duolingo with alternatives
Compare Rosetta Stone and Duolingo and decide which is most suitable for you.
Compare VocApp.com and Duolingo and decide which is most suitable for you.
Compare BABADADA.com and Duolingo and decide which is most suitable for you.