Abhik

Advanced Author Bio automatically adds a short author bio box along with gravatar and social profile links in every single post of your blog. That isn’t all, it also:
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Enables the HTML formatting in author description field
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Adds Facebook profile field in author profile setup page
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Adds Google+ profile field in author profile setup page
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Adds Twitter profile field in author profile setup page
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Adds LinkedIn profile field in author profile setup page
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Adds Pinterest, YouTube, Flickr and StumbleUpon field in author profile setup page (Plugin Version 3.0 onwards)
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Shows the Social Profile link only if the field is populated. (Added on version 2.0, thanks to <a href="https://wordpress.org/extend/plugins/profile/viwickam" rel="ugc">viwickam</a>)
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Shows the Website if any Hompage URL is set at profile. (Added on version 2.0)
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Highly customizable author bio box (Needs the editing of supplied Stylesheet file).
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Shows the Author’s profile image from Gravatar depending on the author’s email.
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A must have plugin for Multi Author Blogs.
Here is a live demo on my <a href="http://www.itsabhik.com/advanced-author-bio-wordpress-plugin/" rel="nofollow ugc">Plugin Homepage</a>. If you are find my plugins useful, add me in your circles on <a href="https://plus.google.com/106671843900352433725?rel=author" rel="nofollow ugc">Google +</a>. Don’t forget to visit my blog <a href="http://www.itsabhik.com" rel="nofollow ugc">ItsAbhikDotCom</a>.

Advanced Author Bio

Adds a short author bio after every single post on your blog. Also, enables HTML formatting tags in author description and adds Facebook, Twitter, Goo …

Wolly aka Paolo Valenti

This plugin allow you to show where you want, inside the loop, a gravatar of the author of the post, the description of the author of the post, the nick of the author of the post and the date of the post.PAY ATTENTION if you are upgrading, please take note that CSS is changed, you find a CSS example in sample.css, copy it in yours style.css and apply the change you need
<h3>Arbitrary section</h3>
<h3>A brief Markdown Example</h3>

addauthor

This plugin allow you to show where you want avatar and bio of the post author.PAY ATTENTION if you are upgrading, CSS is changed

Advanced Author Bio vs addauthor