InterExt is a Joomla! (1.6, 1.7, 2.5) system plugin for globally organising resources added to the head section of your pages.
Manage both MooTools Core and MooTools more, including options to:
Manage jQuery, ensuring only one copy is added to any page, even if multiple extensions are adding it. Includes options to:
InterExt also comes with the ability to sort or apply uniqueness across any custom set of tags in the head section of your pages.
Of course, system plugins are difficult to provide demonstrations for, as they function internally without much that is visible. InterExt is currently in use on this website however, and if you view the source of these pages, you will see that mootools has been removed from all pages (except the ScrollSlider purchase page) as it isn't required, even though it is included by Joomla! by default. jQuery has also been added to every page, as the menu systems on this website require it.
InterExt is a free download, though donations to help support it's continued development would be gratefully received.