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.

Erik Ford

Heavy Heavy

Endnotes is a simple solution for adding footnotes to your WordPress posts or pages. The plugin originated as a fork of John Watson’s FD <a href="https://wordpress.org/plugins/fd-footnotes/" rel="ugc">Footnotes</a> but has been updated to use the WordPress Settings API. The original plugin’s usage and functionality has been retained.
<h4>How to Use</h4>
You can add footnotes to your posts or pages by adding numbered inline content within square brackets. Place the inline content where you would like the superscript numeral to appear.
<pre><code>I am Jack's happy sentence that will contain a footnote[1. I am Jack's happy footnote] for calling out a reference.
</code></pre>
Each footnote must have a number, followed by a period and a space, and then the actual footnote. They don’t have to be unique but it is recommended. It doesn’t matter what the numbers are since the footnotes will be automatically renumbered when the post is displayed.
Footnotes can contain anything you’d like including links, images, etc. Footnotes are automatically linked back to the spot in the text where the note was made.
<h4>Square Bracket Usage</h4>
Do not include square brackets inside the footnotes themselves.
<h4>Unique Footnote Numbers</h4>
Footnote numbers don’t need to be unique but it is highly recommended, especially if the text is identical for multiple footnotes. If you have multiple footnotes with the exact same text and number, you may get undesirable results.

Endnotes

Easily add footnotes to your posts and pages.

YAFootnotes vs Endnotes