Bhagirath Dhanani

Add Custom script and CSS code to header, footer,before post,after post.
1. You can add custom code at header, but before 
2. You can add custom code at footer, but before 
3. You can add custom code before post content, this will display on single page only
4. You can add custom code after post content, this will display on single page only
 You can use plain html, JavaScript and CSS code, but for JavaScript and CSS don’t forget to add and tag

Custom Code

Add Custom script and CSS code to header, footer,before post and after post.

LCweb

Tiny plugin allowing you to write code directly in website’s head and/or footer. Insert code globally or specifically for single pages / posts / etc
Features also a syntax highlighter (ACE) editor, to code faster and safer.
<h4>NOTE:</h4>
No support provided

CustomEasy

Gives you a quick and superlight way to inject codes in your website's HEAD or FOOTER

Custom Code vs CustomEasy