fedmich

This plugin will insert urls of JavaScript or CSS stylesheet files added into a particular posts or page via Custom Fields. 
The scripts (link stylesheet) tags will be then added in your tag 
It doesn’t require other plugin and it can be used as is.

Insert JS or CSS in post via Custom Field

This plugin will insert urls of JavaScript or CSS stylesheet files added into a particular posts or page via Custom Fields.

johnibom

Welcome to WP Custom CSS JS by PieSolutions. 
So you want to add HTML, CSS, Javascript, Jquery or Tracking Pixel on your Website without messing up with your theme’s files? This small and light weight plugin gives you ability to do that right from the wordpress dashboard.
=Features=
HTML (All tags are supported) in the header Block
Inline CSS in Header
Inline JS/jQuery in Header
HTML (All tags are supported) in the footer Block
Inline CSS in Footer
Inline JS/jQuery in Footer
<h3>LOCALIZATION</h3>
<ul>
<li>We are looking for translators. Please reach out to us and/or translate this plugin to your own language here: https://translate.wordpress.org/projects/wp-plugins/wp-custom-cssjs</li>
</ul>

Custom CSS/JS

WP Custom CSS JS plugin allows you to add any HTML, CSS, Javascript, jQuery or Tracking Pixel easily on your wordpress site right from your dashboard.

Insert JS or CSS in post via Custom Field vs Custom CSS/JS