David Beja

<p>This plugin creates a custom post type where you can define multiple HTML signatures that will appear on the bottom of each post/page/custom post type. Only one of these HTML signatures will show each time you open a post/page/custom post type.</p>
<h4>Features:</h4>
<ul>
<li>Random selection of the HTML signature</li>
<li>Limit some signatures to certain post types</li>
<li>Limit some signatures to posts that have certain categories and/or tags</li>
<li>Disable the plugin on some posts</li>
<li>For a certain post select a fixed signature</li>
</ul>


DB Signatures

Add some HTML content to the bottom of every posts, pages and custom post types.

Abinav Thakuri

<p>The WordPress Signature plugin allows wordpress users to have signatures below every post.This is almost similar to forum signatures where you can have a  default signature on every post you make.The plugin is still being developed and the signature need html formating to appear properly.This means tags like <code><br></code> before the signature and anchor tags for links.This will be made easier in future versions.</p>


WordPress Signature

The Wordpress Signature plugin allows wordpress users to have signatures below every post.

DB Signatures vs WordPress Signature