gentlesource

This plugin creates a short URL from the blog post permalink and stores it 
in the database. The URL is displayed below the blog post along with a link 
to twitter that passes the short URL on.
You can use all short URL services that offer an API. Here are a few:
<ul>
<li>http://melt.li/</li>
<li>http://lin.io/</li>
<li>http://unrelo.com/</li>
<li>http://bit.ly/</li>
<li>http://u.nu/</li>
<li>http://tinyurl.com/</li>
</ul>

GentleSource Short URL

Automatically shortens the blog post URL.

Urlshortener.co

Outbound Links Monetization plugin is probalby the easiest way of monetizing your wordpress blog. It’s based on Urlshortener.co CPA advertisement network (http://www.urlshortener.co) which deals mainly with links.
All you need to do is to sign up for Urlshortener.co (http://www.urlshortener.co/backend/register), install our plugin in your wordpress page and configure it by copy&pasting your API KEY and ACCESS TOKEN which is accesible after registration in your Dashboard.
That’s all! Your wordpress blog or website is earning money for you with our Anti-Adblock Solution and CPA. You can check your earnings by logging into urlshortener.co.

Outbound Links Monetization

This plugin will short automatically all the outbound links to monetize your website.

GentleSource Short URL vs Outbound Links Monetization