DigitalTweaker

<p>** No Longer Supported **<br />
DT Author Box is great for those who have multiple authors on a WordPress site and want to show author information at the bottom of every post for each author like a signature. This can include an image, a short bio, a link to the author’s website and their social profiles.</p>
<h4>Social Profiles Added</h4>
<ul>
<li>Twitter</li>
<li>Facebook</li>
<li>LinkedIn</li>
<li>Google+</li>
<li>YouTube</li>
<li>Pinterest</li>
</ul>
<h4>Language Support</h4>
<ul>
<li>German</li>
<li>Spanish</li>
<li>French</li>
<li>Indonesian</li>
<li>Italian – Thanks to Marco Pegoraro for accurate translation</li>
<li>Portuguese</li>
</ul>
<p>Language translation may not be exact, Google Translate was used. If you find any errors, please let me know.</p>
<p><a href="http://www.digitaltweaker.com/web/wordpress/2012/04/digital-tweakers-author-box-plugin-for-wordpress/" title="DT Author Box Plugin Home Page" rel="nofollow ugc">DT Author Box Plugin Homepage</a></p>


DT Author Box

Easily add an author box bio signature with custom profile image and social profile buttons to the end of each author's posts

Soli

<p>This plugin allows you to append a signature after every post. Some variables can be used, such as %post_title%, %post_link%, %bloginfo_name%, %bloginfo_url%, and so on. It supports multiuser.</p>


WP Post Signature

Works great for me

This plugin allows you to append a signature after every post. Some variables can be used.

DT Author Box vs WP Post Signature