Language Hacks

German

There is lots of material for learning German on the internet, and countless Apps.
Here is a list of free material from German institutes:

The Goethe-Institut is the cultural institute of Germany, active worldwide. It promotes the study of German and encourages international cultural exchange.
Here you will find various free offers:
Home: https://www.goethe.de/prj/dfd/de/home.cfm.
Films about Germany: https://www.goethe.de/de/spr/ueb/dlb.html
Audio course: Radio D https://www.goethe.de/de/spr/ueb/rod.html
For people who want to live in Germany: Mein Weg nach Deutschland (My way to Germany)

Deutsche Welle is the international media organisation of Germany, the voice of Germany in the world, with news, reports and much more.
General tips: https://learngerman.dw.com/de/deutsch-lernen/s-9095
There is also a page for learning vocabulary and useful phrases: https://learngerman.dw.com/en/deutschtrainer/c-56705009

Vitamin.de: Journal with stories about Germany and exercises: https://www.vitaminde.de/