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.
Trip - Take a trip. Expand your mind.
OptiLingo - OptiLingo: Dreaming of Speaking a New Language?
Radiohere - Hand curated multi lingual online radio stations
Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.
focusatwill.com - Scientifically optimized music to help you focus