Integrate WP Blog with Wiki and Forum

Hi,

I want to create a wordpress blog website with integration of a forum (presumably phpbb) and a wiki (presumably mediawiki). The integration should be seamless, so that all look the same and cannot be easily distinguished.

I found a similar approach here at www.ads-software.com. As I see it the blog tab is a wordpress blog, the docs tab a wiki and the forum tab some sort of forum software. I was wondering if the wiki and forum are part of wordpress itself or integrated by a plugin? If not, what kind of wiki or forum software is used and how can they be integrated easily. A link to a tutorial would be nice.