ProgClub uses MediaWiki for its wiki software. We have a project called Pcwiki which we use to make our own modifications to MediaWiki. One of our modifications to MediaWiki is the green/orange/black colour scheme with the fixed-width fonts called the OldSkool skin. If you don't like the OldSkool skin there are instructions for turning it off.
Consult the User's Guide for information on using the wiki software.