Code 7 Responsive Accordion Module is a Joomla 2.5+ module that displays articles in a responsive accordion with a minimally styled output.

Easy to use jQuery functionality.
Displays a configurable amount/order of articles from a selected category.
Several functionality options including starting an item open, rendering content plugins and a close button inside each item.
Display options including showing the category, only showing featured items and a few font size controls.

It’s a simple module, it’s to the point and it’s simple to use.