jmarreros

This Plugin shows author’s biography in the foot of the posts, also adds 
social networks and a link to see all the entries written by the author.

Simple Author Bio

Plugin that shows the author's biography in the foot of the posts.

laura20

This plugin adds six functionalities that all blogs should have:
<ul>
<li>Breadcrumbs</li>
<li>Pagination</li>
<li>Post pagination</li>
<li>Related content after posts</li>
<li>Author info after posts</li>
<li>Social sharing buttons after posts</li>
</ul>
You can turn on / off each functionality in one click or add it manually. 
You will find an advanced setting page for easy customization on the wordpress menu.

WP-Basics

Adds breadcrumbs, pagination, post pagination, related content, author info and social sharing buttons to your blog.

Simple Author Bio vs WP-Basics