Erin McIntyre

This plugin searches links on your site for the domain that you specify in the settings, adds your affiliate ID, and makes those links open in a new tab when clicked.
The plugin produces XHTML Strict compliant code and is search engine optimized (SEO). 
This is done using JavaScript’s <code>window.open()</code>-function. It adds only a few lines of vanilla JavaScript to the page, and does not require any external libraries like jQuery.
Most other plugins perform a hack by altering the <code>target</code> parameter (i.e. <code><a href="http://somewhere.example" target="_blank"></code>). That method is not XHTML Strict compliant.
This plugin handles the links client-side, which lets search engines follow the links properly. Also, if a browser does not support JavaScript, the plugin is simply inactive, and does not result in any errors.
Credits 
Inspired by the <a href="https://wordpress.org/plugins/open-external-links-in-a-new-window/" rel="ugc">External Links in New Window / New Tab</a> plugin.
Known bugs 
The plugin conflicts with other plugins that change the links’ `onClick´ attribute.

Affiliatize Me

Alaanassar

Diff Domain New Tab checks your external links and open in new tab.
<h3>Features</h3>
<ul>
<li>Automatically checks all external links</li>
<li>open youtube , google, facebook, twitter or any social media in a new tab</li>
<li>keep your visitor on your site and never loose a single visitor again to external sites</li>
<li>choose what links to open in new tab or widnow.</li>
<li>your website links are filtered automatically</li>
</ul>
jQuery Plugin
https://github.com/basselAhmed/diffDomainNewTab
Thank you
Alaa Alhoseany 
Wael Xman 
Bassel Ahmed
<h4>1.2</h4>
update some data
<h4>1.0</h4>
Initial release

Diff Domain New Tab

Diff Domain New Tab checks your external links and open in new tab.

Affiliatize Me vs Diff Domain New Tab