edwardrpool

This plugin is ultra lightweight. It adds a media button above the tinyMCE editor on both the page and post editor, which when pressed copies a shortlink to your clipboard.
The idea behind this plugin is to add short-linking capabilities, without all the bloated code found in other plugins. This plugin does not alter the database, nor is any data saved or collected. It uses the built in WordPresspost/page ID’s in the URL.

ERP ShortLinks

A very lightweight plugin which adds a shortlink button to the post/page editor for quickly sharing on social platforms.

Kostas Vrouvas

Get the classic “Get shortlink” from WordPress 3.7. Developed to make it easier for people at <a href="https://mentorinculture.com/" rel="nofollow ugc">Mentor</a> to get shorlinks and open sourcing it.
To-do:
<ol>
<li>Connect with Bit.ly API</li>
<li>Options menu to add Bit.ly API keys</li>
</ol>

Get Shortlinks

Get the classic "Get shortlink" from WordPress 3.7. Developed to make it easier for people at Mentor to get shorlinks and open sourcing it.

ERP ShortLinks vs Get Shortlinks