CeiKay

Accordeon Menu CK shows an accordion menu in any sidebar position. Just create a WordPress menu, select this menu in a Accordeon Menu CK widget and that’s it.
<h3>Features</h3>
<ul>
<li>Styling from the plugin settings interface with color pickers and other fields</li>
<li>Open with custom animation and duration</li>
<li>Instant preview of your design in the interface</li>
<li>Multiple use on the same page</li>
<li>Widget to use in your website anywhere</li>
<li>Description for each menu link</li>
<li>Unlimited levels</li>
<li>Click or mouseover behavior</li>
<li>Custom +/- images</li>
<li>20+ themes preinstalled</li>
<li>Import / Export of styles to save and share</li>
<li>Custom CSS option</li>
<li>French translation included</li>
<li>Compatible multilanguage with the POT file</li>
<li>French translation included</li>
</ul>
Get more informations and see the demo on https://www.ceikay.com

Accordeon Menu CK

Allows a huge number of settings, yet the frontend code is minimalistic. Uses the jQuery of WP for transitions / easing, so own JS is very small. The only problem is that it includes CSS styling directly in the head of each page, but you can first style the menu using the plugins great facilities, then copy the CSS to Custom CSS in WordPress or your theme, and finally select "No styling" in the accordeon widget. The absolutely best choice for performance freaks - improves your ranking on Google PageSpeed Insights! Knocks the stuffing out of bloated products with more users and reviews - small is beautiful.

Great free plugin

Accordeon Menu CK shows an accordion menu in any sidebar position with multiple settings.

hollandben

Slidorion is a fantastic plugin that combines an image slider and an accordion to provide a platform that allows you to present information in a beautiful manner.
The plugin is easily customisable and gives you a variety of options such as:
<ul>
<li>Autoplay</li>
<li>Transition easing</li>
<li>Large variety of effects (fading, sliding, overlapping, random)</li>
<li>Choose the first slide</li>
<li>Pause the player on hover</li>
<li>Interval between transitions</li>
<li>Speed of the transitions</li>
</ul>
You can create as many Slidorion’s as you want, as they are all stored as separate entities. All you need to do to place it within any page, is call it’s shortcode like this: [slidorion name=”foo”]

Slidorion

A combination of an image slider and an accordion, the Slidorion displays beautiful images along with a variable length description.

Accordeon Menu CK vs Slidorion