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.
Shows word and sentence counts plus a readability analysis of the post 
currently being edited using three different readability measurements.
Readability analysis is an attempt to show how difficult a text is to read. 
There are several methods of doing readability analysis. The most popular 
methods are used here. The Flesch and Flesch-Kincaid methods use formulas based 
on the average number of words per sentence and the average number of syllables 
per word. The Gunning-Fog method uses a formula based on the average number of 
words per sentence and the percentage of “hard” words (words with 3 or more 
syllables) in the passage.
Both the Gunning-Fog and the Flesch-Kincaid give a score that is the number of 
years of education the reader must have completed to understand the text. 
Different types of writing calls for different scores. Technical subjects may 
require a higher level of education so a higher Fog or Kincaid score is 
acceptable. Informal writing may try for a score in the 7-10 range. The Flesch 
score is a percentage. The higher the value, the better the readability.

FD Word Statistics Plugin

Shows word and sentence counts plus a readability analysis of the post currently being edited using three different readability measurements.

ggwicz

It’s way too easy to accidentally publish or update a post on WordPress.
https://vimeo.com/178698875
Post Lock prevents accidental updating or publishing of content by requiring a password to do either.
<ul>
<li>Adds a layer of protection without adding a headache: unlocking a post is a seamless experience and takes a few seconds.</li>
<li>Works on all post types (you can easily exclude or include post types with a plugin filter).</li>
<li>Simple, solid code.</li>
<li>If a post is unlocked, and two beats of the WordPress Heartbeat API happen without action (which is usally 30 seconds, 15 per beat), then the post is re-locked.</li>
<li>Numerous plugin filters make it easy to customize the plugin.</li>
</ul>

Post Lock

Post Lock prevents accidental updating or publishing of content by requiring a password to do either.

FD Word Statistics Plugin vs Post Lock