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.

Ryan Street

Jason Grim

Background
WordPress has created the wonderful functionality of generating shortlinks for post on your blogs. With advanced 
permalink structures a single link to your site can take up 89% of a short email or a facebok update. However, 
Wordpress created a very ugly system, the shortlink system simply provides the default permalink structure with ugly 
url variables.
Here is the documentation on adding shortlinks to your themes on the <a href="https://codex.wordpress.org/Function_Reference/the_shortlink" title="Wordpress.org - Shortlinks" rel="nofollow ugc">WordPress Codex</a>
Use
Some themes use the template method to share the short url of your post. The use of this plugin would convert all of those 
links to trackable ones with bit.ly or shorter ones with the other services.
Also, when you create a new post a button is created next the the URL of your new post. If you click the “Get Shortlink” button 
a popup will provide a simple little link to share with all of your friends and fans.

Generate Shortlinks

Uses bit.ly, Ur.ly, and Is.gd to create handy shortlinks to share your WordPress Posts quickly and easily!

ERP ShortLinks vs Generate Shortlinks