Sergio Alarcón Felipe

A simple shortcode to implement a table of contents that allows a better navigation in the content of the pages and the entries.
Use code:
<pre><code>[table_content title="In this article we talk about:" link_color="#0073aa" hide_button="true" text_show="Show" text_hide="Hide"]
</code></pre>
All parameters are optional.
<ul>
<li>title: text title</li>
<li>link_color: custom color for links</li>
<li>hide_button: flag if we want to show the hide button, default: true</li>
<li>text_show: text to hide_button when visualize the option to show, default: ‘Show’</li>
<li>text_hide: text to hide_button when visualize the option to hide, default: ‘Hide’</li>
</ul>

SDZ – Table of Contents

nsouta

Navitto adds a fixed navigation bar that follows H2 headings in posts and pages. 
It helps readers understand where they are in long-form content and jump quickly to sections.
Features
<ul>
<li>Fixed navigation bar – Stays at the top or bottom while scrolling and lists H2 headings.</li>
<li>Display modes – Show all headings, choose specific H2 headings, or hide the nav for each post/page.</li>
<li>Customizer – Control preset (simple/theme), position, height, and font weight.</li>
<li>Bulk apply – Enable or disable Navitto on all existing posts from Settings > Navitto.</li>
<li>Theme-aware offset – Attempts to avoid headings being hidden under fixed headers.</li>
<li>Posts and pages – Works on both content types.</li>
</ul>
Source code and support
<ul>
<li>Repository: https://github.com/n-souta/navitto</li>
<li>Issues: https://github.com/n-souta/navitto/issues</li>
</ul>

Navitto

Fixed navigation bar that follows H2 headings and shows a simple, sticky table of contents.

SDZ – Table of Contents vs Navitto