Interesting and useful links:

• GermanAbout.com: http://german.about.com/homework/german/
  One of the most important portal to an array of sites with interesting German stuff
• 1000 deutsche Liede (German Folk Songs) http://ingeb.org/home.html

• Stanford Germanic Collection (Stanford University Libraries):
  http://www-sul.stanford.edu/depts/hasrg/german/ddrkunst/index.html

• Deutsche Bahn (German National Railway): http://www.bahn.de

• Dudenverlag, : http://131.99.21.138/
  One of the most comprehensive publisher in dictionaries
• Wortschatz Woerterbuch: http://wortschatz.uni-leipzig.de/
• The New English-German Dictionary: http://www.iee.et.tu-dresden.de/cgi-bin/cgiwrap/wernerr/search.sh
• A wonderful online German/English dictionary http://dict.tu-chemitz.de

Love poetry?

• deutsceh Gedichte: http://www.uni-giessen.de/~gi04/MM/gedichte/gedliste.html
• Die deutschen Klassiker: Gedichte, Kommentar, u. Biographie: http://www.xlibris.de/
• Projekt Gutenberg, texts from German literature: http://www.gutenberg.aol.de/
• German Authors and German Poems: http://www.uni-giessen.de/~gi04/MM/gedichte/gedliste.html