This small plugin(673 bytes!) enables you to have modular methods on jQuery.
It allows the developer to apply the module pattern, to the functions of jQuery.fn.
They can be used as namespace/module for more functions.
This helps keeping the rule of only claiming one name from the jQuery namespace.
It enables you to do something like:
$(...).foo().bar( ... ).addClass('magic');
Visit the plugin's homepage, in order to learn more about it.