PiotrPress

Clearcode

The CC-Scripts plugin gives Admin users the ability to add custom JavaScript code to every page on WordPress website in the head/footer and/or directly after the opening body html tag. 
Additionally, you can minify scripts using JSMin php library and/or displaying it selectively using dependencies. 
The best part is that you can do this from the Admin panel, perfect for those who don’t have the programming skills needed to manually add custom JavaScript code to template files.

CC-Scripts

Add custom JavaScript code to all your WordPress pages at once via the Admin panel.

trauben-nuss

This plugin adds a abbreviation of the operating system (win, mac, linux, iPad, iPhone) to the body-tag. 
So if there’s a OS-specific difference, you can easily react to it by using the css-selector (e.g. “.mac”).
Next steps of this plugin: 
* adding a settings page 
* add the class to specified elements 
* add user-language-abbreviation to specified elements
let me know, if you wish something helpful.

OS Adder

Add the operating-system's abbreviation as a CSS-Class to the body-tag.

CC-Scripts vs OS Adder