onlineth

A pluginized version of ReadRemaining.js
Tell your readers how long they’ll need to get through all of your gibberish, with this clever jQuery plugin. With WP ReadRemaining TL;DR is a thing of the past.
Personalized – The time is estimated based on the user scrolling speed Non-Annoying – It is set to appear only when the user is actually reading. 
Fully customizable – Bold Comic Sans? No problem, just set the css. But… why? 
Flexible layout – Takes into account text, images or even videos.

WP ReadRemaining

This WordPress plugin allows you to show the user how long it will take to read the article considering the speed in which the user is scrolling.

eroux

Supplying an <a href="https://en.wikipedia.org/wiki/International_Standard_Book_Number" rel="nofollow ugc">ISBN</a> (and, optionally, a Title) will display a cover image of the relevant book with a link to that book’s page on <a href="https://books.google.co.za/" rel="nofollow ugc">Google Books</a> using the Google Books API.
Using the Widget you can choose whether to:
<ul>
<li>Force all calls to Google to be HTTPS, instead of the API returned HTTP</li>
<li>Pad the Image (selected by default, uses internal CSS)</li>
<li>Display a Box-Shadow (selected by default, uses internal CSS)</li>
<li>Choose Alternate Google Country (defaults to “Worldwide”)</li>
</ul>
as well as
<ul>
<li>Decide whether you would like to use a Title</li>
<li>Define the ISBN-10 or ISBN-13 of the book.</li>
</ul>
<h3>Usage</h3>
<ol>
<li>Activate the Plugin via “Plugins” → “Currently Reading” → “Activate” (if you hadn’t already done so).</li>
<li>Go to “Appearance” → “Widgets” and drag the “Reading” widget into whichever Sidebar you choose.</li>
<li>In the “Currently Reading” widget, you can then customise it further.</li>
</ol>

Currently Reading

Displays a cover image of a book with a link to Google Books based on a supplied ISBN-10 or ISBN-13.

WP ReadRemaining vs Currently Reading