flomincucci

This plugin provides a simple Javascript slider, that gets the data from the post meta. It uses thumbnails for navigation, and accepts images and youtube videos. You must provide de image URI in case of images or the Youtube video ID – in case of Youtube videos.

Conslider

Simple Javascript slider. You can use Youtube videos or images, given the Youtube video ID or image permalink.

Frank Goossens

Optimizing Matters

EricJohnsonGuru

Eliminate Render-blocking Javascript in above-the-fold content with Async Javascript.
Render-blocking Javascript prevents above-the-fold content on your page from being rendered until the javascript has finished loading. This can impact on your page speed and ultimately your ranking within search engines. It can also impact your user’s experience.
Async JavaScript gives you full control of which scripts to add an ‘async’ or ‘defer’ attribute to or to exclude to help increase the performance of your WordPress website.

Async JavaScript

Plugin works as expected, settings are nice and minimal (using core styles) and there aren't any banners, notices or other marketing bloating things up.

Works great!

Async Javascript lets you add 'async' or 'defer' attribute to scripts to exclude to help increase the performance of your WordPres …

Conslider vs Async JavaScript