Flickr - image and video hosting website
Bulk Image Downloader - With Bulk Image Downloader you can download full sized images from almost any web gallery.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Vov Picture Downloader - Download pictures from websites.
Google Photos - All your photos are backed up safely, organized and labeled automatically, so you can find them fast, and share them how you like.
WFDownloader App - A free bulk image downloader application that also serves as a multi-purpose bulk downloader for your PC.