Josh Eaton

On display, duplicate whitespace (including unicode whitespace characters) in between sentences or elsewhere within posts will be replaced with a single space. Useful if multiple contributors use different styles for sentence spacing or as a catch-all for any unintended extra whitespace.
This enables consistency in a blog with multiple contributors where one writer uses double spaces between sentences and another uses single spaces.
No modifications are made to the post content itself, the replacement happens when the content is displayed to the user.

Remove Double Space

Remove duplicate whitespace in between sentences or elsewhere within posts. Useful if multiple contributors use different styles for sentence spacing.

enivid

When you publish a post or update an already published post, this plugin will format the post’s content to certain typographic rules:
<ol>
<li>
All hyphens between two words (surrounded by spaces) will be transformed to m-dashes with the non-breaking spaces ahead of them.
</li>
<li>
All hyphens between digits (without spaces) will be transformed to n-dashes. But it tries to preserve phone numbers.
</li>
<li>
All spaces following these words will be replaced with the non-breaking spaces:
<ul>
<li>at</li>
<li>or </li>
<li>and</li>
<li>the</li>
<li>a</li>
<li>an</li>
<li>in</li>
<li>on</li>
<li>of</li>
<li>for</li>
<li>to</li>
<li>as</li>
<li>i</li>
<li>or</li>
<li>my</li>
</ul>
</li>
<li>
Double and more spaces are replaced with the single ones.
</li>
<li>
All misplaced spaces near dots, colons, semicolons, exclamation marks and question marks are fixed, where possible.
</li>
<li>
Composed words with hyphens in them (e.g. easy-to-use) will be wrapped in <code></code> tags.
</li>
<li>
<code><pre></pre></code> tag and its contents are preserved.
</li>
</ol>
<h4>Problems:</h4>
<ol>
<li>
The plugin will not mess with the HTML tags or other mark-up tags delimited with < and >. It will mess with the Javascript code and such constructions as:
<pre><code> [code]
 bla bla bla
 [/code]
</code></pre>
Though, since version 6, the mess is minimized for [code] and [video] tags.
</li>
<li>
The n-dash thing will mess up with the phone numbers that have only one hyphen in them. They will be confused with the value ranges.
</li>
</ol>
<h3>Thanks to</h3>
<a href="https://www.artlebedev.ru/typograf/" rel="nofollow ugc">Typograf by Artemy Lebedev</a>

Post Typographer

Adds non-breaking spaces, `` tags, common spaces, tags and dashes where needed. Works with English texts only.

Remove Double Space vs Post Typographer