Vincent Mimoun-Prat

This plugin allows you to get better control on how your categories are listed. It provides a widget which lets you get more options than the default WordPress category widget (show RSS, hide empty categories, etc.). Furthermore, it allows to hide the children categories and use clickable buttons to expand them. The plugin requires jQuery to be included in your theme. It degrades nicely when javascript is not available to the usual WordPress category list.
<a href="http://enhanced-links.vincentprat.info" rel="nofollow ugc">plugin home page</a>.
I need translators for the plugin, this is not a hard task, just a file to translate. Please contact me if you want to translate. Currently available in English and French.
This plugin is available under the GPL license, which means that it’s free. If you use it for a commercial web site, if you appreciate my efforts or if you want to encourage me to develop and maintain it, please consider making a donation using Paypal, a secured payment solution. You just need to click the button on the <a href="http://enhanced-links.vincentprat.info" rel="nofollow ugc">plugin home page</a> and follow the instructions.

Enhanced Links

A plugin for wordpress which allows you to list your links in a sexier way. Very useful when you have a great number of links and categories.

Morteza Geransayeh

This plugin create dynamic expand/collapse tree-widget navigation from wordpress nav menu. When plugin activated, go to widgets page and drag the widget to theme widgets area and choose menu from the list and that’s all! 
Plugin has a basic-light theme. Yous can create special and bueaty theme (linke top banner screenshot) by yourself. RTL style included in plugin css folder.

WP-Parsi navigation trees

پیشنهاد میکنم از این پلاگین استفاده کنید

This plugin create dynamic expand/collapse tree-widget navigation from wordpress nav menu.

Enhanced Links vs WP-Parsi navigation trees