About 23 objects as of date and the promise of more. They have an English page but with a lot less stuff on it. I don’t think a translation is needed though.

http://www.winhard.de/

EDIT :: 17 April 2008
The site has been restructured and the link is now
http://www.winhard.de/deutsch/gdl/gdl03.html

EDIT :: 9 November 2012
The site has been overhauled again and this time I can’t find the objects.