Simple Sliders is a content plugin for Joomla that creates accordion sliders in an article.

You create sliders by including plugin calls like this in your articles:

{s​lider title="Slider 1 Title" class="blue"}
Slider 1 content.
{s​lider title="Slider 2 Title" class="red"}
Slider 2 content.
{/s​liders}

We use Simple Sliders on our Contact page, FAQ pages, and elsewhere. We previously used the "Sliders" plugin from Regular Labs but eventually decided to write our own. The calling syntax, visual styling and functionality are broadly compatible with Regular Labs Sliders, but Simple Sliders is very "light" by comparison.

Simple Sliders	Regular Labs Sliders
Installs one single plugin	Installs four plugins
Installs 5 files with a total size of 5kb	Installs over 500 files with a total size of 3.5Mb
Does not use or load Bootstrap. Works with or without any version of Bootstrap loaded.	Requires and loads Bootstrap 2 (Javascript and CSS) on every page of the site, including pages that don't use sliders.
Works in Joomla 3 and 4	Works in Joomla 3
Supports URL links with slider parameter	Supports URL links with slider parameter or #tag
Does not support nested sliders	Supports nested sliders
No plugin configuration parameters	Many plugin configuration parameters
No Pro version	Pro version has many advanced features
No editor button	Installs an editor button

The choice is yours. Both products are free!