DJ-Extensions.com

The plugin that allows you to display widget with blog posts and pages content in tabbed or collapsed (accordion) view. 
The user may also select to show: post thumbnail, readmore link and publish date. Number of panels and their ordering are unlimited, even thumbnail size can be adjusted which makes this widget very friendly and flexible to user. Simple, easy to style, well optimized and clean package.

PE Panels

Show your posts and pages in tabbed or collapsible way !

Accordion to display links. It allows you to provide multiple panes and display them one at a time. It is like having several CollapsiblePanels where only one can be expanded at a time.

jMaki Accordion

It allows you to provide multiple panes and display them one at a time.

PE Panels vs jMaki Accordion