Questo | City Exploration Games - Play a real-world city game on mobile @ the best travel app
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.
Fog of World - Go around the world and remember everywhere you have been in your whole life journey!
LanguageBeast.com - Study English synonyms and antonyms to enrich your vocabulary
World Brush - AR app where you paint on the real world for others to find
Skeebdo - Learn English words from any movie/TV show