Hover Zoom - Enlarge thumbnails on mouse over.

Unsplash - Unsplash is a website with high-quality free HD images. It has a catalog of more than three hundred thousand striking images that are neatly organized with tags. Read more about Unsplash.

Imagus - The extension is intended to complement image features that (I think) is missing from Opera by...

Pexels - Find the best free stock images about Browser Home Page. Download all photos and use them even for commercial projects.

Image Max URL - Help find larger or original versions of images, including a customizable image popup feature

Image Extractor - Extract.pics is an easy to use tool that allows you to extract, view and download images from any public website.