- General Rules: http://german.about.com/
- Der/Die/Das Cases & Explanations: http://german.about.com/library/blcase_sum.htm
- Prepositions: http://www.brighthubeducation.com/learning-german/30653-how-to-use-german-prepositions-with-examples/
- Der Spiegel magazine articles: http://www.spiegel.de/
- Thousands of Copyright-Free German Texts: Projekt Gutenberg
- Website of the Deutsches Historisches Museum: http://dhm.de/
- The World of the Habsburgers: http://www.habsburger.net/
- Castles and History: http://www.germany.co.za/german_castles.html
- 20th-Century Germany: http://www.deutschegeschichten.de/