Date: 03/02/2013 Enhanced Folding Category List for WordPress 2.8+
As your blog gets more and more posts you will inevitably create more categories to keep them organised. Eventually your categories will take up more room on your screen and scroll across many pages. I work on one blog which has over 350 categories and with this number the standard WordPress category list is the height of three or four screens - any content below this is lost!
Folding Category List for WordPress is a plug-in that will only show the top level categories and the current sub-categories. This will save a lot of space on your sidebars for other widgets. Additionally, you can animate the menu as either a drop down horizontal menu or an accordion style vertical menu, both with cool jQuery animations.
This plugin can be configured via a new settings page which can be found under Settings->FoCaL. All the settings are now documented and explained on this screen.
More details can be found in on the plugin homepage: http://azuliadesigns.com/focal/