sippsolutions

If you host your site in a poor environment, WordPress may fail uploading large images as the process of creating the different sizes and thumbnails takes a large amount of CPU usage.
With this Plugin the images are simply resized to a maximum dimension (of for example 1600 x 1600 pixels) right in your browser before uploading them. 
The nice side effect is that unnecessary big images are resized to a fine size to still provide a usable, qualitative image.
Logo credits: Picture graphic by Flaticon from Freepik.

Canvas Image Resize

Re-sizes images right inside the browser BEFORE uploading them.

temperal

This is a WordPress plugin for the Temperal PhotoSynth service that provides an easy to use short code. 
The plugin may be placed in any page

Temperal PhotoSynth

Temperal PhotoSynth is the easiest no-code solution to optimize and transform images directly in markup.

Canvas Image Resize vs Temperal PhotoSynth