headjs

Converts render-blocking CSS and JS files into NON-render-blocking, improving performance of web page.

Improve page load performance by asynchronously loading javascript using head.js

Head.js is a script to asynchronously load and manage dependencies of javascript and CSS assets.

Uses HeadJS to load your enqueued scripts asynchronously, in parallel, executing them in order.

A WordPress plugin to load your Javascript files via Head JS.