WebTechee

When you click an anchor link (#section), sticky headers hide content. 
This plugin adjusts scroll position so the anchored section is fully visible.

Sticky Header Anchor Fixer

Fixes anchor jumps hidden under sticky headers.

albedo0

Automatic Hx Menu scans your content for heading tags and builds an in-page navigation with anchor links. 
You can also enable automatic numbering for your headings.
Shortcode: 
Use <code>[automatichxmenu]</code> in a post/page to insert the menu manually. In “Automatic & Shortcode” mode, the shortcode has priority.
Main features 
– “Back to top” links 
– Collapsible submenus 
– Automatic numbering for titles 
– Smooth scroll options (speed, offset) 
– Show on posts, pages or both 
– Enable/disable on the homepage 
– Many display options (alignment, width, margins, colors, borders, custom CSS)

Automatic Hx Menu

Automatically generate a navigation menu from the titles of a post or a page

Sticky Header Anchor Fixer vs Automatic Hx Menu