http://www.goethe.de   Goethe Institution: art, culture, and news in German, German lessons and activities, games and puzzles.

http://german.about.com   German facts, news, culture, and events; German lessons, exchanges, chat.

http://www.dw-world.de/select_html/0,,,00.html     German Radio station: news, information, music, and various services in or about Germany in 31 different languages.

http://www.interdeutsch.de/studien1.htm German vocabulary and grammar exercises and activities, German dictionaries and useful links, German lessons. 

http://deutsch-als-fremdsprache.de/ German as a foreign language, German news, information, exchanges, and jobs, German activities and exercises.

www.Juma.de German youth magazine, various topics for German lessons, book reviews, exchanges, Internet projects.