Most of these pages are in broken English , since I don't believe you get anywhere on the internet without speaking at least broken English :-) Some pages are also available in German.
Tools used to create these pages.
I tried to understand Nielsens book on usability before the redesign.
A self programmed XML , XSLT rendering engine, wrapped in Java generated the HTML. XSLT is done by the great Java engines Saxon, by Michael Kay and more and more by Johannes Döblers jd.xslt, which seems to be disappearing right now.
The sole editor used to create source, html, xhtml and xml is VIM with a dose of syntax highlighting.