This website is implemented using the excellent DokuWiki engine.
wrap plugin is providing boxes and other stuff in various places.
yalist provides multi-paragraph lists.
tag, pagelist and cloud plugins for the wiki tag cloud.
loadskin enables template switching between DbScout diagrams and the rest of the site.
discussion plugin (along with CAPTCHA plugin support).
Some features are provided by small changes to the core DokuWiki engine.
ini_set('display_errors', 'Off'); to doku.php
You're welcome to take these if you want them but beware – they are over-written whenever you upgrade your wiki!