farinspace

This plugin allows you to show and hide specific portions of content within a post or page. Visitors can then use custom show/hide links to show or hide the portions you’ve defined. The plugin enables a few WordPress shortcodes: <code>[peekaboo]</code>, <code>[peekaboo_link]</code> and <code>[peekaboo_content]</code>.
To learn more read the <a href="http://farinspace.com/wordpress-peekaboo-plugin/" title="Peekaboo extended documentation" rel="nofollow ugc">extended documentation</a>.

Peekaboo

This plugin allows you to show and hide specific portions of content within a post or page. Visitors can then use custom show/hide links to show or hi …

leocolomb

This plugin adds internal and external links into post and page, based on different sources:
<ul>
<li>Custom keywords</li>
<li>Posts</li>
<li>Pages</li>
<li>Categories</li>
<li>Tags</li>
</ul>
The plugin provides simple and standard interfaces:
<ul>
<li>Clean & clear admin page that allow highly customizable usage</li>
<li>Useful CLI commands</li>
<li>Respect PHP standards, web standards and security standards</li>
</ul>
Low load impact in mind, some requirements are requested:
<ul>
<li>PHP 7.2+ (⚠ requirement)</li>
<li>WordPress 5.0+ (⚠ requirement)</li>
<li>Object Cache handler (⚠ requirement)</li>
</ul>
<h3>Contributors</h3>
<a href="https://colombaro.fr" rel="nofollow ugc">Léo Colombaro</a>

Peekaboo vs Auto Links for WordPress