natekinkead

When you upload a new image in WordPress, this plugin will use the file name to automatically fill in the Title, Alt text, Caption fields, and Description so you don’t have to do it manually.

Image Automatic Alt Text and Caption

Automatically fills in the Alt text, Caption, and Description from the image file name of new image uploads.

PiotrPress

Clearcode

This plugin adds the <code>[img]</code> shortcode which replaces the <code><img></code> html tag. It’s also enables adding new media to post/page via the ‘Add media’ button by automatically inserting the formatted shortcode code to the editor. 
You can simply add the <code>[img]</code> shortcode with a media ID to display:
<pre><code>[img 123 /]
</code></pre>
or a fully formatted <code>[img]</code> shortcode:
<pre><code>[img 123 align="center" size="full" caption="Sample text" title="Sample text" desc="Sample text" alt="Sample text" url="http://example.com/" /]
</code></pre>
It’s supports <code>srcset</code> and <code>sizes</code> parameters.
<h4>Tips & Tricks</h4>
You can use your own html template file for displaying the <code>img</code> tag by using filter:
<pre><code>add_filter( 'Clearcode\IMG_Shortcode\template', function() { return '/themes/clearcode.cc/templates/img.php'; } );
</code></pre>

CC-IMG-Shortcode

This plugin adds the [img] shortcode which replaces the `` html tag.

Image Automatic Alt Text and Caption vs CC-IMG-Shortcode