Pierre Prinetti

Set your anchor name in the options page.
Typical use case: a big picture in the header you don’t want people 
to be bothered with every time they click on an internal link. But 
you still want that beautiful picture to be there.
Feel free to contribute: 
github.com/pierreprinetti/wp-permamod

wp-permamod

Very simple plugin that adds an anchor to page and post permalinks, which can point to an existant anchor in your template.

KilukruMedia

Simply add anchors links inside your content. Shortcode <code>[wpanchor id="your_id"]</code> is added via a button in Wisiwig. After your need to create a link inside your site with #your_id for the href link. Your link look likes <code><a href="#your_id">my link</a></code>

WP Simple Anchors Links

Insert simply many anchors to pages, posts and custom post type.

wp-permamod vs WP Simple Anchors Links