Looking for an 'answers' plugin

Hi there,

I’d like to add an ‘answers’ page to my website, so I’m looking for a plugin to manage it.

I need to create categories and then to post question+answer under these categories.
I searched for a Q&A plugin but most of them are user-focused, while I don’t want my users to be able to post questions, I just want to manage a list of questions and to display it on a page.

Here’s a good example of what I want to do: http://sagmeisterwalsh.com/answers/

Thanks a lot!