Debashish

Author Spotlight widget displays the profile of the author(s) with Social links (example: Twitter, Facebook) and his/her profile picture or Gravatar on any post or page that has an Author. The widget automatically detects the current author(s) of the displayed post or page; just drag and drop the widget on your sidebar and you are done.
To display a custom photograph with the Author’s Profile you may install the <a href="https://wordpress.org/extend/plugins/user-photo/" title="User Photo WordPress plugin" rel="ugc">User Photo</a>. In absence of this plugin the widget will fall-back to displaying the Gravatar associated with the user. If your posts have multiple authors you may use the <a href="https://wordpress.org/extend/plugins/co-authors-plus/" title="Co-Authors Plus WordPress plugin" rel="ugc">Co-Authors Plus</a>, the Author Spotlight will then display all the author profiles one below another for such post/page.
Note that installing the User Photo or Co-Author plugin is purely optional, this widget will work fine without them as well.
If you face any issues with the plugin or have any suggestion/feature requests please do so <a href="https://wordpress.org/tags/author-profile" title="Author Spotlight plugin support forum" rel="ugc">at the support forum</a>.

Author Spotlight (Widget)

A Sidebar widget to display the Author(s) profile on any Page or Post along with Social web links.

newbiesup

This plugin will automatically add an author box below the post/page. It also lets the author to enter and display their social profiles like Facebook, Twitter and Google+.
You can easily customize the appearance of the author box with native WordPress Customizer.
<h4>Features</h4>
<ul>
<li>No settings required. Just install and activate it.</li>
<li>Or you can customize its appearance with native WordPress Customizer</li>
<li>Author Avatar</li>
<li>Author Social Profiles</li>
</ul>

WP Author Box

Automatically add an author box below your post content, with social profile icons

Author Spotlight (Widget) vs WP Author Box