webgarb

TabGarb is a WordPress plugin which gives your wordpress a power to change content into Javascript tab enable content very easily, Tabgarb use HTML comment tags in place of using tags like [ (tabs), [tabs] , {tabs} ] which make your content wordpress friendly ( TabGarb Formatting tag will not spoil your content in case TabGarb is not installed in your wordpress ). 
TabGarb come with editable css theme ( you can edit tabs css from your admin panel easly ) and you can change the speed and effect of changing tab direct from TabGarb Settings in WordPress admin. 
New feature 
2.3 : Add normal Page Load Functionality (using this make your post/page fast load).
More information will be found <a href="http://webgarb.com/tabgarb/" rel="nofollow ugc">here</a>
We are continue updating our plugin Thanks for your all support and comments. !
Updates 
* TabGarb now has language support. ( you can contribute the language translation to tabgarb it will be gr8 help thanks ).
Usage 
Usage information will be found <a href="http://webgarb.com/tabgarb/" rel="nofollow ugc">here</a>
Please Mention About this plugin 
Please Mention about this plugin and help to improve more .. 
Please comment what you think about this plugin at <a href="http://webgarb.com/tabgarb/" rel="nofollow ugc">here</a> .!
Thank you very much.
,Ayush

TabGarb Pro

Split divide page / post content into tabs enable content easily!.

sevenspark

The new accessibility javascript in the Appearance > Menus panel in WordPress 3.6 can significantly slow the page load speed when using a large number of menu items (> 50). This plugin defers the accessibility processing to eliminate the scripting bottleneck and allow the Appearance > Menus screen to run much faster and more responsively.
<a href="http://sevenspark.com/wordpress/speeding-up-the-appearance-menus-screen-in-wordpress-3-6" rel="nofollow ugc">Full details</a>
This solution is fairly rough. Hopefully we can develop a robust solution that can eventually become part of the core. Pull requests through GitHub are welcome.

TabGarb Pro vs Faster Appearance – Menus