liaison

<p>ExcerptCustomizer plugin replaces the ellipsis (…) with a<br />
custom text string (length less than 50, including space)<br />
with selected padding (To replace space). The excerpt string<br />
is easily broken in many themes if the excerpt string contains<br />
space. Not compatible with all themes.</p>
<h3>Build Status</h3>
<h3>Development</h3>
<p><a href="https://github.com/liaisontw/excerptStuff" rel="nofollow ugc">ExcerptCustomizer</a></p>


Excerpt Customizer

ExcerptCustomizer plugin replaces the ellipsis (...) with a  custom text string with selected padding.  Not compatible with all themes.

tepelstreel

<p>The RSS Image Feed doesn’t create a feed of images, but ataches the first image of the post to your feeds. Normally only the content has images showing. With our plugin there will be a clickable image even in the excerpt and in the content there will be only one image instead of all the images of the post. Since version 2.2 it works as a multisite plugin as well.</p>
<p>The plugin was tested up to WP 4.5 It should work with versions down to 2.7 but was never tested on those.</p>


RSS Image Feed

The RSS Image Feed adds the first image of a post to your feeds, even in firefox and even if you only display the excerpt.

Excerpt Customizer vs RSS Image Feed