BirdBrain Logic

Adds useful custom fields to your WordPress user profiles, allowing in depth user profiles to appear below the posts in your WordPress theme. Give your contributors the attention and credit they deserve with a featured biography and links to their social channels.
<h4>Features</h4>
<ul>
<li>Easy to setup in just 2 simple steps.</li>
<li>Seamlessly integrate author profiles throughout your WordPress website</li>
<li>Supports multiple authors</li>
</ul>
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Author Profile Plus

Supercharge your WordPress user profiles with Author Profile Plus

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.

Author Profile Plus vs Author Bio Widget