WPKube

The plugin restores the <code>Title</code> field (that was removed from WordPress 4.2) in the insert link popup box and adds a new <code>Add rel="nofollow" to link</code> checkbox to it.
Gutengerg (Block Editor) Note: At the moment it’s not possible to add the functionality to Gutenberg, it’s a different system from the classic editor and it does not have a hook/filter which allows adding custom settings. As soon as it becomes possible to add the functionality to Gutenberg we will update the plugin.
This plugin has been adopted and maintained by <a href="https://www.wpkube.com/" rel="nofollow ugc">WPKube</a>, a popular WordPress resource site, where you can find guides on <a href="https://www.wpkube.com/category/wordpress-plugins/" rel="nofollow ugc">WordPress plugins</a>, <a href="https://www.wpkube.com/best-wordpress-hosting/" rel="nofollow ugc">WordPress Hosting</a>, and more.

Title and Nofollow For Links (Classic Editor)

I just installed this on WP 4.9, and it works like a charm. I ended up adding HTML Class manipulation as well, by coping the code in the JS file that added the title field.

Works Well

works with wp 5.2.1

Helpful tool

The plugin adds a title and a rel="nofollow" checkbox to the insert link popup box. Only for Classic Editor, NOT Block Editor.

Moove Agency

Use radio buttons or checkboxes for your categories and custom taxonomies with this incredibly powerful, easy-to-use, well supported and 100% free WordPress cookie plugin.
(Please note that the “select all” functionality can work with checkboxes only.)
<h3>Testimonials</h3>
★★★★★
<blockquote>
“Works perfectly!” – <a href="https://wordpress.org/support/topic/works-perfectly-1565/" rel="ugc">IamRJO</a>
</blockquote>
★★★★★
<blockquote>
“Very helpful. Easy to use.” – <a href="https://wordpress.org/support/topic/very-helpful-easy-to-use-4/" rel="ugc">cardofearing</a>
</blockquote>
★★★★★
<blockquote>
“Exactly what I was looking for.” – <a href="https://wordpress.org/support/topic/exactly-what-i-was-lookng-for/" rel="ugc">marketmeau</a>
</blockquote>
<h3>About us</h3>
<a href="https://www.mooveagency.com/" rel="nofollow ugc">Moove Agency</a> is a premium supplier of quality WordPress plugins, services and support. <a href="https://www.mooveagency.com/services/wordpress-development/" rel="nofollow ugc">Visit our site</a> to learn more.

Select All Categories and Taxonomies, Change Checkbox to Radio Buttons

Thanks Moove for this handy plugin.  Haven't used it long but it helps with clients who are having trouble with Categories / Custom Taxomies.  This helps with the confusion. If you're a developer, this is a handy little tool to install before handing off a website to a client.

Very helpful. Easy to use.

I used it years ago and it was well done. 

But for now it seems to stoped working with newer wordpress versions (with classic editor plugin):

- Wrong Term in Radio list is selected on Editpage Loading, saves the wrong term on update.
- Button [+ Add Term] adds an uneditable id number

maybe in this area there had been changes to the wordpress API that should be updated here.

Was very good

Use radio buttons or checkboxes for your categories and custom taxonomies with this incredibly powerful and easy-to-use plugin.

Title and Nofollow For Links (Classic Editor) vs Select All Categories and Taxonomies, Change Checkbox to Radio Buttons