Peter Westwood

This plugin allows you to specify a specifc excerpt for WordPress pages.
The plugin adds an extra box to the set an Optional Excerpt for a WordPress page similar to the box which is available for posts. The box is aded using the dbx_page_advanced hook for versions of WordPress earlier than 2.5 and using add_meta_box() for WordPress 2.5 and later.

PJW Page Excerpt

This plugin allows you to specify a specifc excerpt for WordPress pages.

WPKube

FancyThemes

This plugin adds several improvements to WordPress’ default way of creating excerpts.
<ol>
<li>Keeps HTML markup in the excerpt (and you get to choose which tags are included)</li>
<li>Trims the excerpt to a given length using either character count or word count</li>
<li>Only the ‘real’ text is counted (HTML is ignored but kept)</li>
<li>Customizes the excerpt length and the ellipsis character that are used</li>
<li>Completes the last word or sentence in an excerpt (no weird cuts)</li>
<li>Adds a read-more link to the text</li>
<li>Ignores custom excerpts and use the generated one instead</li>
<li>Theme developers can use <code>the_advanced_excerpt()</code> for even more control (see the FAQ)</li>
</ol>
Most of the above features are optional and/or can be customized by the user or theme developer.
Banner image credit – <a href="https://www.flickr.com/photos/chillihead/" rel="nofollow ugc">chillihead</a>
Original plugin author – <a href="https://profiles.wordpress.org/basvd" rel="nofollow ugc">basvd</a>
Useful Resources
<ul>
<li><a href="https://fancythemes.com/what-is-wordpress/" rel="friend nofollow ugc">What is WordPress</a></li>
<li><a href="https://fancythemes.com/wordpress-themes" rel="friend nofollow ugc">Fee Themes</a> and <a href="https://fancythemes.com/wordpress-plugins/" rel="friend nofollow ugc">plugins</a></li>
</ul>

Advanced Excerpt

Control the appearance of WordPress post excerpts

PJW Page Excerpt vs Advanced Excerpt