hypercoder

CodeBlock is a free WordPress plugin that enables visitors to copy programming code with a single click. It features:
<ul>
<li>A simple lightweight plugin in with no dependencies; the whole package consist of a PHP, a JavaScript and a CSS file (1.92KB)</li>
<li>Makes use of short-codes</li>
<li>Works with stylized code. That is, it only copies the code not the underlying HTML elements</li>
<li>Spam free. It will never bag (ehm, bug) you for ratings, permissions…etc.</li>
</ul>

HyperCoder CodeBlock

CodeBlock is a free WordPress plugin that enables visitors to copy code blocks with a single click.

vanjok

At first – this plugin created to add your own fields and additional content in clipboard. 
Just Activate plugin for adding source link (your site with a title from the current page). 
At first, this plugin will add copyright protection.
<h4>Summary</h4>
You will be pleased that everyone who copies content from your site will already 
automatically insert it with a link to the source of your site. 
This plugin used custom fields. 
In admin page you can fill add params for addition content after source link (in Clipboard). 
Enjoy!

Clipboard with title content-IVD

Super

License: GPLv3 Clipboard system implementation.

HyperCoder CodeBlock vs Clipboard with title content-IVD