German language resources
There are a wide variety of online resources for language study.
Dictionaries and grammar reference
Grammis (grammar information system provided by the Institut für Deutsche Sprache)
LEO (largest online German/English dictionary)
Wortschatzportal of Leipzig University (dictionary with linguistic information)
Online courses, exercises and podcasts
Goethe Institut online exercises
JETZT online language course (authentic texts and reading exercises)
Österreichspiegel(resources for learners and teachers of German)