wplift

Super Refer A Friend is plugin which adds a new widget to your blog which allows readers to email the page they are on to a friend via a popup box. 
They can enter more than one email address and customise the message that is sent. 
The plugin includes a captcha and you can set a mailing limit to prevent spam
Support at http://wplift.com/refer-a-friend-wordpress-plugin

Super Refer A Friend

Creates a widget to send the current page to a friend via email with a message.

neykane

Neykane Viral List Posts is designed with content creators in mind and handles all of the boring configuration so you can focus on producing rich, quality content for your readers.
<iframe loading="lazy" title="Neykane Viral List Posts" src="https://player.vimeo.com/video/337669289?dnt=1&app_id=122963" width="750" height="422" frameborder="0" allow="autoplay; fullscreen; picture-in-picture; clipboard-write"></iframe>
On the most basic level, a list post ( or a <a href="https://en.wikipedia.org/wiki/Listicle" rel="nofollow ugc">listicle</a> ) is just an article in list format.
Here’s a few real world examples:
<ul>
<li><a href="https://www.nytimes.com/2019/03/15/arts/television/netflix-originals.html" rel="nofollow ugc">10 Recent Netflix Originals Worth Your Time</a></li>
<li><a href="https://www.ismailzai.com/blog/7-serial-fiction-podcasts" rel="nofollow ugc">7 Podcasts You Need to Be Listening To</a></li>
<li><a href="https://www.ismailzai.com/blog/5-command-line-techniques-to-be-more-productive" rel="nofollow ugc">5 Command Line Techniques to Be More Productive</a></li>
</ul>
What will you create?

Neykane Viral List Posts

Adds a new "List Posts" Custom Post Type to help you create memorable, well-organized, and highly-shareable list posts.

Super Refer A Friend vs Neykane Viral List Posts