stratosg

Writing a post with footnotes has never been easier and cleaner before. All you need to do is anchor a footnote at any point and then write it on the end of the paragraph or wherever it fits you.
Usage
To anchor a footnote use the {{FOOTNOTE_NUMBER}}. Then to write the body of it you need to embrace it with [[FOOTNOTE_NUMBER]]. Here is an example:
—— document starts here ——- 
Lorem ipsum dolor sit amet, con sectetuer adipiscing elit, sed diam 
tempor incidunt ut labore et dolore magna ali quarn erat volupat.{{1}} 
venian, quis nostrud exerci tation ullamcorper{{2}} suscipit laboris 
commodo consequat. Duis autem vel eum irure dolore
[[1]]This is the first footnote.[[1]] 
[[2]]This is the second footnote.[[2]]
This is the next paragraph. Lorem ipsum dolor sit amet, con sectetuer 
adipiscing elit, sed diam nonnumy nibh euismod tempor incidunt ut 
labore et dolore magna ali quarn erat volupat. Ut wisi enim ad minim. 
—— document ends here ———
When the document is parsed, the footnotes that are between paragraphs will be removed from where they are and placed at the end of the document. The {{1}} will be replaced with an anchor link to the footnote. The footnotes will be a list having and anchor link back to the place the text has it. Here is what roughly the above text will look like after parsing:
—— document starts here ——- 
Lorem ipsum dolor sit amet, con sectetuer adipiscing elit, sed diam 
tempor incidunt ut labore et dolore magna ali quarn erat volupat.[1] 
venian, quis nostrud exerci tation ullamcorper[2] suscipit laboris 
commodo consequat. Duis autem vel eum irure dolore
This is the next paragraph. Lorem ipsum dolor sit amet, con sectetuer 
adipiscing elit, sed diam nonnumy nibh euismod tempor incidunt ut 
labore et dolore magna ali quarn erat volupat. Ut wisi enim ad minim.
FOOTNOTES 
1. This is the first footnote. 
2. This is the second footnote. 
—— document ends here ———
The up arrows and the [1] and [2] are the links. There are a few options that you can tweak, for now it’s in the code. Please refer to the plugin’s homepage at: http://www.stratos.me/wp-plugins/yafootnotes
<h3>Requirements</h3>
None what so ever…
<h3>Credits</h3>
Mr. Mike Nichols from http://anxietypanichealth.com/ inspired me, motivated me and helped me debug.
<h3>Contact</h3>
Suggestion, fixes, rants, congratulations, gifts etc to stratosg@stratosector.net 
Also visit the plugin’s page at http://www.stratos.me/wp-plugins/yafootnotes/

YAFootnotes

Yet Another Footnotes (YAFootnotes) is a plugin that gives you the ability to add footnotes to any text you are writing.

K. Adam White

defomicron

Civil Footnotes is a WordPress plugin for adding footnotes on your blog. Civil Footnotes parses your posts for notes wrapped in ((double parenthesis)), then extracts that parenthesized text into a footnote list at the end of the post.
There are many solutions for managing footnotes within your WordPress website, but Civil Footnotes distinguishes itself from the rest with a simple, readable plain text syntax that works whether you’re using the WordPress block editor, a Markdown editor, or the classic editor plugin.
The majority of Civil Footnotes’ formatting is taken from the blog <a href="https://daringfireball.net/" rel="nofollow ugc">Daring Fireball</a>, which first debuted this style of footnotes <a href="http://daringfireball.net/2005/07/footnotes" rel="nofollow ugc">in 2005</a>. The key difference is the addition of a <code>title</code> attribute to the footnote reference in the text which permits sighted mouse users to efficiently read the note by hovering their cursor over the reference number.
<h4>Credits</h4>
Civil Footnotes was originally created by <a href="https://defomicron.net/" rel="nofollow ugc">Austin Sweeney</a> and is currently maintained by <a href="https://www.kadamwhite.com" rel="nofollow ugc">K. Adam White</a>.
<h3>License & Attribution</h3>
This plugin is licensed under the terms of the <a href="./license.txt" rel="nofollow ugc">GNU General Public License</a> (or “GPL”). It is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

Civil Footnotes

Add footnotes to your site using a simple, easy-to-read inline syntax ((by wrapping footnote content with double-parentheses)).

YAFootnotes vs Civil Footnotes