webnns

Create smart internal links automatically. 
Supports multiple anchors, categories, post types. 
Does not modify saved content.

WebNNS Auto Anchor Links

Automatically replaces anchor text with links based on rules.

gonafr

Check content and create a widget menu with links that point to words between the HTML tags you choose. 
It was initially thought and created for the HTML tags of the titles (h1, h2, h3…), but you can use it in other situations.

Anchors Menu

Check content and create a widget menu with links that point to words between the HTML tags you choose.

WebNNS Auto Anchor Links vs Anchors Menu