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.

AS OF MAY 2016, THIS PLUGIN IS NOT BEING MAINTAINED AND WILL NOT RECEIVE ANY FUTURE UPDATES. 
CONTACT ME IF YOU’D LIKE TO LIST AN ALTERNATIVE HERE.
Alternatives: 
– https://wordpress.org/plugins/footnotation/
This plugin provides an extremely easy way to add elegant looking footnotes to 
your posts. The syntax is natural, simple to understand, and degrades 
gracefully if the plugin is removed. Footnotes are linked unobtrusively and the 
note itself links back to the original text where the footnote is referenced.
Adding footnotes to a post is simple. Just type them inline in your post in 
square brackets like this:
<pre><code> [1. This is a footnote.]
</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>Settings</h4>
Only show footnotes on single post/page: This option will hide 
footnotes on the main blog page. Footnote numbers will still appear 
but link to the individual post/page URL.
Collapse footnotes until clicked: When checked, footnotes are 
hidden until manually expanded or a footnote number is clicked.
Note: Do not include square brackets [] inside the footnotes themselves.
Note: Footnote numbers don’t need to be unique but it is recommended, 
especially if the text is identical for multiple footnotes. If you have 
multiple footnotes with the exact same text and number then you’ll get weird 
and incorrect footnotes on your post.

FD Footnotes Plugin

Add elegant looking footnotes to your posts simply and naturally.

YAFootnotes vs FD Footnotes Plugin