“Youtube ToolTip” is a simple plugin, which changes all your links of “youtube” on a fast preview for the convenience of your readers.
Modifying all the links and using “jQuery” shows an attractive & modern blog.
Also use “qTip”, qTip is a tooltip plugin for the jQuery framework. It’s cross-browser, customizable and packed full of features! 
qTip is licensed under the open source MIT license, which allows you to use the script for whatever you want, whenever you want, however you want, as long as you include a copy of the license!
For more information about this plugin visit http://javiergalicia.wordpress.com/2009/07/03/youtube-tooltip-to-wordpress/

Youtube ToolTip

"Youtube ToolTip" Click on any of your links to get a quick preview of the youtube video.

Md. Habibur Rahman

Quick Permalink Flusher is a lightweight WordPress plugin that allows you to flush your permalink structure quickly with a single click. This is particularly useful when you’ve made changes to your permalink settings or added custom post types, and you need to refresh your rewrite rules without navigating through multiple menus.
Features: 
– Flush permalinks with just one click. 
– Improves site performance after updating permalink structure. 
– Simple and user-friendly interface.
<h3>Acknowledgements</h3>
Thanks to the WordPress community for creating such an amazing platform!

Quick Permalink Flusher

Short Description: Quickly flush permalinks in WordPress with a single click.

Youtube ToolTip vs Quick Permalink Flusher