I am sure many of our more Internet-seasoned readers know about Free Rice. It is a website where you can answer questions in different subjects, and each correct answer gets ten grains of rice donated through the WFP.
One of the subjects that Free Rice has available is foreign languages. You can answer vocabulary matching questions in German, Spanish, Italian, French, and English (or Chemistry, Geography, or Math for that matter). If you are just beginning a new language, this can be a good way to build your vocabulary. What I like the best is that the German vocabulary also includes the case with the word, something I have seen other flash-card websites not do. The site also reintroduces words you answered incorrect more often, so that you are more likely to learn those words.