Steve

This plugin allows you to specify an alternative domain name to use with the built in URL shortening service.
For this to work it requires the chosen domain to be pointed / parked on the hosting account used for your blog.

Custom Shortlink Domain

Customise the domain name used to generate shortlink URLs.

Ivan Barreda

Shortener Simple creates in an easy way, links with customizable url, with landing page that can be changed and reused.
<ul>
<li>You can change the destination url.</li>
<li>Accounting visits to the link.</li>
<li>Indicates the code with which you want to redirect to the destination URL (301 by default).</li>
</ul>

Shortener Simple

Generador de enlaces cortos personalizables, modificables and reutilizables.

Custom Shortlink Domain vs Shortener Simple