• www.greenpeace-berlin.de
  (accessible content, akronymmanager)
• www.deutsche-windindustrie.de
  (accessible content, akronymmanager)
  

Fairly accessible (because of strange design requirements):

• www.system-effizienz.de
  (accessible content, akronymmanager)
• www.eu-greenbuilding.org
  (accessible content, akronymmanager)