PiotrPress

Clearcode

The WordPress CC-TOC plugin automatically creates a table of contents (TOC) for posts/pages (and/or custom post types) based on headings in content. This plugin can also output a listing of child pages (INDEX).
The TOC by default appears before, while the INDEX appears after the content post/page.
<h4>Tips & Tricks</h4>
<ol>
<li>You can disable support for TOC and/or INDEX displaying in specific post/page edit page manually.</li>
<li>You can also use shortcode (by default <code>toc</code> and/or <code>index</code> – you can change it in the settings): 
[toc] and/or <code>[index]</code></li>
</ol>

CC-TOC

This plugin automatically creates a table of contents based on html headings in content.

Noruzzaman

WP Messiah

BoomDevs

MD Robin Islam

Md Enamul Haq

Excellent Plugin

Easily creates SEO-friendly table of contents for your blog posts and pages. Offers both Auto and Manual Insert with highly customization options.

CC-TOC vs TOP Table Of Contents