remm

<p>This plugin provide widget that display a list with categories and posts in your sidebar.<br />
Widget can save the opened categories, and use cache.</p>


Wp Ajax Tree

This plugin provide a widget that display a category and pages tree on your sidebar, using ajax to collapse categories.

Pär Thernström

MarsApril

<p>This plugin adds a widget that makes your page list expandable/collapsible with a nice slide animation effect.</p>
<h4>Nice Navigation Features and highlights:</h4>
<ul>
<li>Simple and nice collapsible/expandable menu with your pages</li>
<li>Better overview over your pages</li>
<li>Instantly navigate to sub-pages</li>
<li>Uses jQuery for a nice animation effect (hence the name)</li>
<li>Users with JavaScript disabled will se a regular menu</li>
<li>No downsides for SEO/Google, all pages still browsable by search engines</li>
<li>All arguments/options available for wp_list_pages is available for this plugin/widget.</li>
<li>Styles can be overridden with your own custom CSS</li>
<li>Looks cool! 😉</li>
</ul>
<h4>Donation and more plugins</h4>
<ul>
<li>If you like this plugin don’t forget to <a href="http://eskapism.se/sida/donate/" rel="nofollow ugc">donate to support further development</a>.</li>
<li>Check out some <a href="https://wordpress.org/extend/plugins/profile/eskapism" rel="ugc">more WordPress CMS plugins</a> by the same author.</li>
</ul>


Nice Navigation

A widget that add a list of your pages as a list with option to expand and collaps the page tree with a nice slide animation effect.

Wp Ajax Tree vs Nice Navigation