Flickr - image and video hosting website
New Google Photos - Shared suggestions, libraries and photo books
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Viso - Beautiful minimal image viewer for MacOS
PhotoPrism.app - PhotoPrism® is an AI-Powered Photos App for the Decentralized Web. It makes use of the latest technologies to tag and find pictures automatically without getting in your way. You can run it at home, on a private server, or in the cloud.
Yogile - Photo storage simplified