Andy Whalen

WP Hooks is a plugin for WordPress that allows you to add JavaScript, HTML, or other code to your 
header and footer without modifying your theme. WP Hooks uses the wp_head() and wp_footer() hooks 
built in to WordPress to add content to your header and/or footer. It’s great for those who have 
custom JavaScript, CSS, or other code (Google Analytics, meta tags, etc.) in their header or footer 
and don’t want to or can’t modify their theme.
Find <a href="http://amwhalen.com/blog/projects/wp-hooks/" rel="nofollow ugc">more instructions and discussion</a> on the WP Hooks home page.

WP Hooks

WP Hooks allows you to add JavaScript, CSS, meta tags, etc. to your header and footer without modifying your theme.

WP Scripts Customizer provides you with two fields that will output to the head section of your site before the closing head tag and just before the closing body tag. These will appear on every page of the site and are a great way to add analytic code, Google Font and other scripts. Only user with unfiltered_html capability that able to access these fields. unfiltered_html allows you to post HTML markup or even JavaScript code. Developed by <a href="http://themehall.com" title="themehall" rel="nofollow ugc">themehall</a>

WP Scripts Customizer

WP Scripts Customizer allows to enter scripts you would like output to head and footer of your WordPress theme page via WordPress Theme customizer.

WP Hooks vs WP Scripts Customizer