Browse quickly through all aspects of German grammar.

Lots of information and links.

Flashcards+ is one of the best apps to learn vocabulary.

Learn basic travel phrases with this App.

A very well structured site where you find about everything you need to learn German.

One of the most comprehensive grammar trainers.

Improve your listening skills. Browse through a whole set of links (site is in German).

If you want to only use only one single page to learn German, this might be your first choice.