OTWthemes

Easily create all different kinds of Separators / Dividers for your WordPress site. Insert Separators / Dividers anywhere in your site – page/post editor, sidebars, template files. No coding is required. It is all done in a nice and easy interface.
Separators / Dividers Options
<ul>
<li>Margin Top and Bottom</li>
<li>Display Line</li>
<li>Text</li>
<li>Text Alignment</li>
<li>Link Text </li>
<li>Link URL</li>
<li>Custom CSS Class</li>
</ul>
Insert Separators / Dividers Anywhere in your site
Basically Separators / Dividers can be inserted anywhere in your site
<ul>
<li>Page/post WYSIWYG editor by using the buttion in the editor</li>
<li>In sidebars by using the OTW Shortcode Widget</li>
<li>In template files by using the Separator’s shortcode and WordPress do_shortcode function</li>
</ul>
Custom styling
If you need to further style a Separators / Dividers here are your options:
<ul>
<li>Each Separators / Divider shortcode has it’s unique CSS class that can be used to style all Separator / Divider.</li>
<li>Create a new class for each instance of a Separators / Dividers shortcode in its interface so you can style it individually.</li>
</ul>
Localization/Internationalization
This plugin comes Localization/Internationalization ready. It is following WordPress I18n standards.
Full version of the plugin
<blockquote>
Upgrade to the Pro version of this plugin – the fastes way to build your WordPress based site including regular updates and premium support: 
 <a href="https://1.envato.market/c/1246358/275988/4415?subId1=cm&subId2=2020&subId3=https%3A%2F%2Fcodecanyon.net%2Fitem%2Fcontent-manager-for-wordpress%2F7431829&u=https%3A%2F%2Fcodecanyon.net%2Fitem%2Fcontent-manager-for-wordpress%2F7431829" rel="nofollow ugc">Content Manager</a> | <a href="http://otwthemes.com/demos/1ts/?item=Content%20Manager&utm_source=wp.org&utm_medium=page&utm_content=upgrade&utm_campaign=cml" rel="nofollow ugc">Demo site</a>
</blockquote>
<ul>
<li>Custom Responsive Layouts – Build in Seconds</li>
<li>Front-end Editor – Edit your layouts and content in the front-end of your site</li>
<li>40+ Shortcodes with add/edit Interface, Custom and Imported Shortcodes</li>
<li>Insert Shortcodes Anywhere – Layouts, Page Editor, Sidebars, Template files</li>
<li>Insert Sidebars Anywhere – Layouts, Page Editor, Template files</li>
<li>WordPress Widgets Anywhere – Layouts, Page Editor, Template files</li>
<li>Content Sidebars</li>
<li>Support and Updates</li>
<li>Zero Coding Required</li>
</ul>

Separator Shortcode and Widget

Create Separators / Dividers. Nice and easy interface. Insert anywhere in your site - page/post editor, sidebars, template files.

mountbatt

This plugin adds a separator between the intro text and the extended (more…) text of the content of a post. It simply replaces the span id more tag with the separator that is set in the plugins php file.
Some separator samples are given there.
Upload into the /plugins directory and activate it in the Plugins Menu.
History:
1.1:
Fixed a bug that forced WordPress Adminmenu to show a white blank page.
1.0:
Initial Release

Add a Separator

Simple Plugin to add a separator between the intro and the (more...) content.

Separator Shortcode and Widget vs Add a Separator