by Verb_Form04 on WordPress.org
Add snippets to the header and footer of your site..
This is a very simple plugin that allows you to add snippets such as CSS and Javascript to the header and/or footer of your site. You can add both side-wide snippets and page specific snippets.
add jquery lazy loading to images
Add custom headers to each page, post, or custom post type. Header options include: featured image, custom image, slideshows, HTML, scripts, and more.
Custom CSS and JavaScript allows you to add custom internal and external CSS and JavaScripts to individual posts.