xaraartech

Abuzer

Adds functionality to search images from post page and attach as featured image. 
You will require to create an API key on bing for search API. 
GOTO: https://azure.microsoft.com/en-us/services/cognitive-services/bing-image-search-api/ or https://dev.cognitive.microsoft.com/docs/services/56b43f0ccf5ff8098cef3808/operations/571fab09dbe2d933e891028f 
And generate your “Ocp-Apim-Subscription-Key”

External featured image from bing

Adds functionality to search images from post page and attach as featured image.

toannth

Requires at least: 4.4 
Tested up to: 4.9 
Stable tag: 1.0.0 
License: GNU General Public License v2 or later 
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Resizes WordPress images on the fly using Nginx Image-Filter.

Ngx Image Resizer

Requires at least: 4.4 Tested up to: 4.9 Stable tag: 1.0.0 License: GNU General Public License v2 or later License URI: http://www.gnu.

External featured image from bing vs Ngx Image Resizer