Fahad Murtaza

WP Help

CURRENTLY WORKING ONLY WITH CLASSIC EDITOR
This plugin adds additional functionality when you create a link in a blog post or pages. When you add a link, the link function will now include the following options:
<pre><code>1. rel="nofollow"
2. rel="sponsored"
3. rel="ugc"
</code></pre>
This makes it easier to comply with new Google SEO link standards.
The plugin’s main features are:
The ability to select: “nofollow”, “sponsored”, or “ugc” when creating a link 
The ability to select to open in a new tab or window

WP Better SEO Links

Adds a checkbox in the insert link popup box for including rel="nofollow", rel="sponsored", and rel="ugc" in links as yo …

Dekisugi

This “Insert Footnote” plugin add any text or HTML code at the bottom of all post contents. If you are tired of text-insertion plugins that is just too bulky and complicated, this simple and light plugin is ideal for you. Javascripts such as adsense codes can also be added.
The nice thing about this plugin is you don’t get extra blank lines above and below your custom footnote, therefore looks nicer on your posts. Visit <a href="http://dev.coziplace.com/free-wordpress-plugins/insert-footnote" rel="nofollow ugc">Official</a> page.

Insert Footnote

This plugin add custom texts/HTMLs/scripts below all post contents. This plugin is so light.

WP Better SEO Links vs Insert Footnote