mallsop

List site contributors allows you list your site’s contributors and authors. 
Just add the shortcode [listsitecontributors] to a page on your blog. 
Optionally you can use the User Photo Plugin (https://wordpress.org/extend/plugins/user-photo/) for images, 
otherwise Avatars will be used.

List Site Contributors

ashishodich

WP SimplePost Contributors plugin allows you to add more than one author to the post.
<h3>Usage</h3>
Simply go to add or edit post page and the contributors list will apear just aside of your post body. Just check the authors who have contibuted and publish or update the post. 
Contributor list will be display below the post content.

List Site Contributors vs WP SimplePost Contributors