Julen

How much time have you spent every time you have created a table of contents manually? Or you may even haven’t do it because of the pain that it would suppose to do it manually?
With this plugin, you will be able to generate tables of contents for your posts in a completely easy, automated and personalizable way. It automatically looks for every <h*> tag, to generate the table entries for them.
Features:
<ul>
<li>Configuration of the depth level of the table.</li>
<li>Configuration of the indentation of the levels of the table.</li>
<li>Option to add to the elements of the table link to each section.</li>
</ul>

TinyMCE Table of Contents

Completely automated and instantaneous way of generating tables of contents for posts.

mdavison

Plugin to automatically generate a table of contents based on Headings tags. Also generates links to the headings on the page. User can choose which headings 
tags to include in Settings.

MD Table of Contents Generator

Didn't Work

Plugin to automatically generate a table of contents based on Headings tags.

TinyMCE Table of Contents vs MD Table of Contents Generator