GoldenDict - The program has the following features: Use of WebKit for an accurate articles' representation, complete with all formatting, colors, images and links.
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.
Lexpanse - 2450 free basic offline dictionaries in 50 languages available for download.
OptiLingo - OptiLingo: Dreaming of Speaking a New Language?
Dictionary Universal - An application for viewing StarDict dictionaries and dictionaries in Lingvo DSL format.
Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.