Hi,

I have created a category called "Referanser" where we should add some reference project articles to show to our (potentially) customers what we can deliver. I have added 4 extra fields to this category (project name, customer name, date from, date to).

I would like to list all of the articles in the "Referanser"-category to show all articles in a table-like list with columns, where project=column1, customer=column2 and so on. I don't think I would like to show any of the article text in this list; rather show a "Read more" button to open this article.

Does anyone got any idea of how to sort this out, which extensions to use?

You need to override the category view and create a new subtemplate.
This post will help you on working with multiple K2 subtemplates.

www.joomlaworks.net/blog/item/194-k2-inheritance-sub-templating