WordPress is used by most hackerspace sites. It’s easy to set up and it’s easy for non-techies to use. It requires little maintenance, has a great community behind it and has lots of themes and plugins. It’s simple to install and use, and saves a lot of the the effort involved in creating a website. However, it’s primarily for blogs, and tends to lack proper support for many necessary features: Wiki, Forum, Mailing List integration, Events management & calendars.
The goal is to create a collection of WordPress plugins that allow community spaces (and particularly hackerspaces) to easily set up.