Co-Authors Widget

Co-Authors Plus is one of the most useful plugin for multiple authors blogs. This plugin add a widget to add users’ avatars to post also for guest authors and for posts with multiple authors.
You can also add avatars with a shordcode [blog-post-coauthors].
The plugin add also a slider in order to show user’s profile. If you want change the style, you can modify blog-spoiler.css file in the plugin folder.