Konrád Koller

Do you like to write long articles with many headers? Then this is the perfect plugin for you. This plugin will add a link next to your headers so your user can share your posts pointing to specific parts. Plus a smooth scroll script is also included which will make the overall experience even better.
The package contains a predefined style for Git-like link display but it is hardly recommend to change the style to fit your needs (and your design).
The plugin uses internal cache which may interfere with other cache plugins, if you experience anything strange feel free to contact the plugin author.

ONet Header Linkifier

For advanced users! Github-like header parser for your posts, pages and custom contents. Also lets you fetch TOC for any content.

k00ni

If you are using a sticky, fixed menu in your WordPress theme, this plugin is the best to deal with the menu overlapping your anchored content. Insert exact menu height to jump before your anchor target. With the PRO version you can also adjust the value for a mobile breakpoint by width.
<blockquote>
Mobile First Feature and Premium Support 
 The Plugins First team provides active one to one email support for everybody who bought <a href="https://plugins-first.io/en/product/fixed-menu-anchor-wordpress-plugin/" rel="nofollow ugc">the PRO-version</a>. The PRO version comes with premium support and the mobile first feature.
General Support and Bug Reports 
 General support is provided within the <a href="https://wordpress.org/support/plugin/fixed-menu-anchor" rel="ugc">Support area</a> of WordPress.org, where you can also report bugs.
</blockquote>
<h4>Highlights</h4>
<ul>
<li>Simple, easy to configure / setup</li>
<li>You can define a standard distance between screen top and anchor target, which will be used whenever maximum viewport does not apply.</li>
<li>Define a certain CSS-class, when it is attached on a link, the click event will be ignored.</li>
<li>Define a maximum viewport width until a certain distance between screen top and anchor target is to be used (relevant for mobile optimized menu – only PRO version).</li>
<li>Browser agnostic – It is fully compatible with all major browsers: Firefox, Chromium/Chrome, Safari, Opera, Edge</li>
<li>Theme agnostic – You can use it in every theme as long as jQuery library is loaded.</li>
<li>Tested up to WordPress 4.5</li>
</ul>
<h3>Setup and Usage</h3>
<ul>
<li>Go to Appearence->Fixed Menu Anchor and choose the distance value.</li>
<li>That value should be a little bit higher than the fixed menu of yours.</li>
<li>After saving the value, you should jump in front of each anchor-target without the concerning about overlayed content anymore.</li>
</ul>

Fixed Menu Anchor

If you are using a sticky, fixed menu in your WP theme, this plugin is the best to deal with it overlapping anchored content.

ONet Header Linkifier vs Fixed Menu Anchor