Starbox is the Author Box for Humans. Professional Themes to choose from, HTML5, Social Media Profiles, Google Authorship

Assign multiple bylines to posts, pages, and custom post types with a search-as-you-type input box.

PublishPress Authors is the best plugin for adding authors, co-authors, multiple authors and guest authors to WordPress posts.

Easily add an author, a guest author or multiple authors to your posts and display their info in a beautiful and fully customizable author box.

Solves the co/multi-author problem without modifying the theme. Uses a custom taxonomy, "Byline," that replaces the Display Author.

Enables full support for the Co-Authors Plus plugin in Genesis.

The plugin add a widget and a shortcode in order to show authors of an article. It is compatible with Co-Authors Plus.

Add an Co-Authors facet to FacetWP

Decouple authors from users. Instead of using users as authors use a special taxonomy for it.

It will display only the concerned contributor posts and other details of that contributor for the posts types and the Custom Post Type.

This plugin adds some xtras to authoring profile: profile image, social media contacts, as well as alternative author and multiple authors.

The plugin is ideal for blogs with multiple authors and acts as an incentive for making quality posts.

This very simple plugin allows multiple authors to be assigned to a Post or Page.

Provides Twitter Login Functionality with smoothness and simple.