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.
Silicon Valley Dictionary - Urban dictionary meets Silicon Valley
Lingvo TV - Learn languages while watching movies on Netflix.
Urban Dictionary Random Word - Random word when you open a new tab in Chrome
Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.
Words For That - the reverse-Urban Dictionary of the internet