Best Plugin…also not affect your website loading speed

I used many plugins but but all bad other than this one.
Feture:

• It not loaded not needed css code to every page which slow your site
• easyly costumissable
• easy to use and you can modify with your requirement
• light waight plugin
• its free

Thanks for auhtor or creator of this plugin they definetly really work hard for this otherwise i dident get it