florianluce

With Shortener URL Redirect, You don’t have to do anything! 
When you publish a new post, page or custom post type, a short url is generated. You can share it, and it will redirect the user to the long url page. It’s invisible to him! 
This plugin does not use any external service.
example: 
https://your-site.com/ab2CdF redirect to https://your-site.com/my-categorie/my-post-name
optimisation available:
<ul>
<li>Create a short URL for each new publication (post, custom post types, page)</li>
<li>Redirect short URL to long/default URL</li>
<li>Display the short link to copy on admin publication</li>
</ul>
Notes: 
This plugin is actually not tested with: 
* Multisite network 
* Translate plugins 
* Other plugins

Shortener URL Redirect

Generate short url for all posts, custom post types and pages to redirect your user to the long URL. No more long URLs share!

karmacracy

With Karmacracy, you have fun while sharing links. Send cool links, while you improve yourself and get relevant: win awards, get domain clips, talk about revelant words as you get clicks sending good kcies, knowing new people and discovering new content. Check karmacracy and have fun!” />
This wordpress plugin will allow you to insert the widget from karmacracy in all your posts with just a button.

WP Karmacracy

Allows you to insert the Karmacracy Widget in your blog in an easy way.

Shortener URL Redirect vs WP Karmacracy