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.