The knowledgebase itself runs on Daisy. It is an example of how something useful can be made with some simple customizations such as document information aggregation (a.k.a. publisher requests) and customized document styling. The implementation is part of the Daisy site sources which can be obtained from Subversion:

svn export http://svn.cocoondev.org/repos/daisy/site/

The folder and file icons used on this site are (C) Copyright http://www.everaldo.com/