Tim Eckel

Try it out on a free dummy site here => <a href="https://demo.tastewp.com/read-more-excerpt-link" rel="nofollow ugc">https://demo.tastewp.com/read-more-excerpt-link</a>
When WordPress makes an excerpt from your post content, it crops the content and adds an ellipsis […] to the end. This plugin changes the ellipsis to a Read More link to the full post content.
You can change the Read More link text to anything you wish from the Read More Excerpt submenu on the WordPress Settings menu.
Also from the Read More Excerpt submenu, you can specify the excerpt word length (WordPress defaults to 55 words).
Additionally, you can force the Read More link to show even when an excerpt is entered or when a read more tag is added to the content. This is turned on from the Read More Excerpt submenu with the Show More Frequently checkbox.
The Read More link uses the class read-more-link, so you can stylize the link any way you wish.

jordanwebdev

This plugin allows you to specify in the settings page a CSS class, and then looks for any elements that contain it and trims the text down so that it does not overflow its container’s height. This is for vertical trimming of multi-line text, and also works if the element has direct children.
<h4>HOW TO USE</h4>
Once you install and activate the plugin, there will be a new tab for it under the “settings” admin menu. Go to this page, and enter the name of the CSS class you are using in your HTML to specifiy which elements should be truncated. Click save, and that’s it!
<h3>License</h3>
<pre><code>Copyright 2016 Jordan Carter

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
</code></pre>

Text Snipper

An easy to use text truncator that trims down multi-line overflowing text and adds an ellipses("...") to it.

Read More Excerpt Link vs Text Snipper