ElbowRobo

This plugin is for WordPress, it adds a dashboard menu. Once you have activated the plugin it will automatically alter copied text of the main website using settings in the dashboard. Including copy altering for:
<ul>
<li>Copyright information</li>
<li>Restricting amount</li>
</ul>
<h3>Donations</h3>
If you want to support the plugin head over to: <a href="http://www.stormation.info/portfolio-item/read-more-copy-link/" title="Stormation.info official page for Read More Copy Link" rel="nofollow ugc">Stormation</a> where you can comment about the plugin.

Wooliet

“Read More Right Here” uses the jQuery framework already included with WordPress installations. RMRH hooks into the WordPress creation of the 
“more” link and adds a custom class. When your blog is loaded, all links of this custom class are modified to no longer send the user to that post’s 
single page display when clicked. Instead, the WordPress database is queried for that specific post, and all content after the  tag (i.e. only what you need) is returned. 
The new content is then immediately displayed to the user, inline with the opening content.
For more information, please visit the <a href="http://www.wooliet.com/wp-plugins/" rel="nofollow ugc">Woolie T. WP plugins page</a>.

Read More Copy Link vs Read More Right Here