Plugins kategorisearre as asynchronous | https://fy.wordpress.org

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

This plugin load the stylesheets asynchronously and improve page load times.

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

Asynchronous Widgets allows you to have any registered widget on your WordPress.org-powered site be loaded…

Lets the user create lists of video embeds that load and play asynchronously in one…

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

This plugin allows you to build your templates in a AngularJS way.

LH Email enables you to queu your emails so they are sent asynchronously.