Darko Gerguric

This plugin creates a basic accordion from custom posts. 
Fully compatible with WPML, just translate your posts and use shortcodes as explained below. 
The plugin currently does not support Woocommerce.
<h3>How to use</h3>
<ol>
<li>To use this plugin you need custom post registered. 
You may check <a href="https://codex.wordpress.org/Post_Types" title="Post Types" rel="nofollow ugc">Post Types</a> to see how to do it.</li>
</ol>
Example from WP Codex – for testing, copy and paste code below to theme functions.php
<pre><code> add_action( 'init', 'create_post_type' );
 function create_post_type() {
 register_post_type( 'Accordion',
 array(
 'labels' => array(
 'name' => __( 'Accordions' ),
 'singular_name' => __( 'Accordion' )
 ),
 'public' => true,
 'has_archive' => true,
 )
 );
 }
</code></pre>
<ol>
<li>Add shortcode to page or post where you want to use accordion</li>
</ol>
If you used code above to create custom posts type you would use following shortcode:
<pre><code>[gw_accordion post_type="Accordion"]
</code></pre>
Optionally, you may add CSS class
<pre><code>[gw_accordion post_type="Accordion" class="my_css_class"]
</code></pre>
You can also add code to your theme
<pre><code><?php echo do_shortcode('[gw_accordion post_type="Accordion"');?>
</code></pre>
or with the CSS class
<pre><code><?php echo do_shortcode('[gw_accordion post_type="Accordion" class="my_css_class"]');?>
</code></pre>
You also may set ordering, default is by ID and Ascending (ASC)
[gw_accordion post_type=”Accordion” class=”my_css_class” order_by=”title” order=”asc”]
<h3>Demo</h3>
<ol>
<li><a href="https://plugins.darkog.pro/custom-post-accordion-demo/" rel="nofollow ugc">Check Demo</a></li>
</ol>
<h3>Known Issues</h3>
If your theme uses smooth scroll script like this one
<pre><code> jQuery(function() {
 jQuery('a[href*="#"]:not([href="#"]').click(function() {
 if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
 var target = jQuery(this.hash);
 target = target.length ? target : jQuery('[name=' + this.hash.slice(1) +']');
 if (target.length) {
 jQuery('html,body').animate({
 scrollTop: target.offset().top
 }, 2000);
 return false;
 }
 }

 });

 });
</code></pre>
You may need to change this line
<pre><code> jQuery('a[href*="#"]:not([href="#"]')
</code></pre>
To look like this
<pre><code> jQuery('a[href*="#"]:not([href="#"], a:not([data-toggle])')
</code></pre>
to avoid conflict

Custom Posts Accordion

This plugin creates Bootstrap accordion form custom posts.

Johan van der Wijk

The <a href="http://www.vanderwijk.com/wordpress/wordpress-custom-post-widget/?utm_source=wordpress&utm_medium=website&utm_campaign=custom_post_widget" rel="nofollow ugc">Content Blocks</a> allows you to display the contents of a specific custom post in a widget on in the content area using a shortcode.
Even though you could use the text widget that comes with the default WordPress install, this plugin has some major benefits:
<ul>
<li>The Content Blocks plugin enables users to use the WYSIWYG editor for editing the content and adding images.</li>
<li>If you are using the standard WordPress text widgets to display content on various areas of your template, this content can only be edited by users with administrator access. If you would like non-administrator accounts to modify the widget content, you can use this plugin to provide them access to the custom posts that provide the content for the widget areas.</li>
<li>You can even use the featured image functionality to display them in a widget.</li>
<li>The Content Blocks plugin is compatible with the WPML Multi-Language plugin and automatically shows the correct language in the widget area.</li>
<li>The Content Blocks can be included in posts and pages using the built-in shortcode functionality.</li>
</ul>
This plugin creates a ‘content_block’ custom post type. You can choose to either display the title on the page or use it to describe the contents and widget position of the content block. Note that these content blocks can only be displayed in the context of the page. I have added ‘public’ => false to the custom post type which means that it is not accessible outside the page context.
To add content to a widget, drag it to the required position in the sidebar and select the title of the custom post in the widget configuration.
Includes the following translations:
<ul>
<li>Swedish (sv_SE) by <a href="http://krokedil.se" rel="nofollow ugc">Andreas Larsson</a></li>
<li>Spanish (es_ES) by <a href="https://www.ibidemgroup.com" rel="nofollow ugc">IBIDEM GROUP</a></li>
<li>Portuguese (pt_BR) by Ronaldo Chevalier</li>
<li>Polish (pl_PL) by Kuba Skublicki</li>
<li>Dutch (nl_NL) by <a href="https://vanderwijk.nl" rel="nofollow ugc">Johan van der Wijk</a></li>
<li>Czech (cs_CZ) by <a href="http://jsemweb.cz/" rel="nofollow ugc">Martin Kucera</a></li>
</ul>
<a href="https://translate.wordpress.org/projects/wp-plugins/custom-post-widget" rel="nofollow ugc">More translations are very welcome!</a>

Content Blocks (Custom Post Widget)

I was looking for something like this that goes perfectly with page builder based on widgets. Easy to use, simple and gets the job done.

Simple and effective

This plugin enables you to edit and display Content Blocks in a sidebar widget or using a shortcode.

Custom Posts Accordion vs Content Blocks (Custom Post Widget)