Fubra

ray.viljoen

The Author Bio Widget displays some basic information about the author of the page or post being viewed.
The bio includes the author’s gravatar, nickname and bio information as set in the user profile. 
The author’s name will also link to the main blogroll filtered by content from the same author.
The widget settings include a custom title and a size option for the gravatar ( profile picture ).
Developed by <a href="http://www.catn.com" rel="nofollow ugc">PHP Hosting Experts CatN</a>

Author Bio Widget

A simple sidebar widget to display page or post author's bio and link through to other content from the author.

snowbedding

Adds an author box after your post contents, with Gravatar and social profile links. 
* More than 10 Social Profile supported 
* Set custom avartar image instead of registering Gravartar account. 
* Compatible with [WordPress SEO by Yoast] plugin. 
* WordPress 3.9 Ready!

Author Box After Posts

Adds an author box after your post contents, with Gravatar and social profile links.

Author Bio Widget vs Author Box After Posts