With Mootools Enabler/Disabler, you decide, if Mootools will be loaded on your website, and that saves up to 600 kb bandwidth. Although it is included in the Joomla package, you don't needed in most cases. The installation and handling is very easy. You can add all components, which use Mootools, directly in the plugin manager and disable it for all other. The download is free. Mootools Enabler/Disabler is native to Joomla 2.5 and Joomla 3.0.