Hover Zoom - Enlarge thumbnails on mouse over.
Unsplash Bulk Downloader - Download a batch of stock images from Unsplash at once!
Image Max URL - Help find larger or original versions of images, including a customizable image popup feature
Sand Ripper - It's a small web app that rips textures from images and save hours.
Hover Zoom+ - Google Chrome extension for zooming images on mouse hover - extesy/hoverzoom
Image Extractor - Extract.pics is an easy to use tool that allows you to extract, view and download images from any public website.