The byline on a post gives the name of the writer. Molongui Authorship automatically modifies the byline on your posts to display the name of all the authors for that post. What is more, it makes each name link to their author pages.
Actually, you can choose how many authors to display, which delimiter to use between co-authors and the prefix/suffix to add. And each author name in the byline will link to the author page unless you disable that feature.