Sai Prasad

This plugin is a tiny Vanilla JS library that adds parallax animations on any images and it stands out for its ease and its visual rendering. The parallax effect is directly applied to image tags, there is no need to use background images. 
You can find demo after installing the plugin

Awesome Parallax Effects

it is unique

This plugin use to adds parallax animations on any images/videos. The prallax effect is directly applied to image or video tags and their containers a …

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 !

Awesome Parallax Effects vs Image Parallax