Languages Online is a very impressive site with hundreds of different activities mostly for beginners in German, French, Spanish and Italian. Most of the German activities seem to be based on Heinemann's LOGO textbooks.

Languages Online is produced by teachers at the RGS, High Wycombe. It's a useful site, consisting mainly of Hot Potatoes activities. I list it under Royal Grammar School in my personal list of Favourite Websites:
http://www.camsoftpartners.co.uk/websites.htm
It's one of many similar sites produced for MFL by school teachers.