CC-TOC

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.

Tips & Tricks

1. You can disable support for TOC and/or INDEX displaying in specific post/page edit page manually.
2. You can also use shortcode (by default toc and/or index — you can change it in the settings): [toc] and/or [index]