farinspace

HiFi is a head injection and foot injection plugin (or head include, foot include, head insert, foot insert, what ever you want to call it). It basically allows you to inject <code><script></code>, <code><style></code>, <code><meta></code> and any other code you want into the head and foot areas of your posts and pages. The code injected is page-specific, this means that only the pages you want code inserted into will be affected.
This plugin is most useful when you have specific functionality that needs to be added on a per-post/page basis.

HiFi (Head Injection, Foot Injection)

HiFi is a head and foot injection plugin. It allows you to inject code into the head and foot areas of your posts and pages on a per-page basis.

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.

HiFi (Head Injection, Foot Injection) vs WP Hooks