LugNet
= Lego user community
URL = http://www.lugnet.com/
Description
"totally independent by the company – is one of the best examples of a community where users co-create and co-design based around a manufacturer’s products. Here, users do not only swap parts or share pictures of their individual models, but also build together an open source based design software to create great expert constructions. Also, a whole number of small user shops sell unique models and designs." (http://mass-customization.blogs.com/mass_customization_open_i/2005/08/lego_factory_ch.html)