Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Clozemaster - Learn a language through mass exposure to useful vocabulary in context.
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
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.
OwnTracks - Cross-platform location sharing
Bialect - Learn languages faster with stories.