WebMaestro.Fr

Upload the layers of your image, and create a parallax effect !
It works great on smart devices too !
The first step is to create with your favorite picture editing software (Photoshop, GIMP…) an independent image for each ground composing your image. All these layers shall be the same size, and should be in .png format as they are meant to include transparency areas. 
Then, on your post editing page in WordPress, click the Insert Media button, and (the same way you would create a gallery) upload your layers under the Create Parallax item. Reorganise the layers if needed, from the background to the front. 
You can finally configure the animation (calibrate, invert, limit, scalar, friction), and publish !
There is <a href="http://webmaestro.fr/image-parallax-plugin-wordpress/" rel="nofollow ugc">some examples</a> on the plugin page.
It uses <a href="http://wagerfield.github.io/parallax/" rel="nofollow ugc">parallax.js</a> by Matthew Wagerfield.

Image Parallax

Create images with a parallax effect. Upload some layers, configure the animation, and publish !

Bukza

Cinematic – is a responsive. touch-friendly Slider that displays your content with parallax 3D effect. 
You can easily prepare layers for your own images in photo editor – a video lesson for Adobe Photoshop is included. 
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/w63lzbJ2g7I?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
<a href="https://www.youtube.com/watch?v=w63lzbJ2g7I" title="See in action on the video!" rel="nofollow ugc">Video</a> 
<a href="https://cinematic.bukza.com/" title="Visit our website to see live demo!" rel="nofollow ugc">Website</a> 
<a href="https://codecanyon.net/item/cinematic-3d-parallax-touch-slider-for-wordpress/23379722" title="Check out our PRO version with more features." rel="nofollow ugc">Pro Version</a>

Cinematic 3D Parallax Touch Slider

Responsive 3D Parallax Touch Slider. The most realistic mobile 3D layer photo animation in the market.

Image Parallax vs Cinematic 3D Parallax Touch Slider