Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Flickr - image and video hosting website
Picorator - Picorator is a simple yet powerful image sharing application developed by online communities.
imgbox - Imgbox is a free image hosting service.
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.
ImgBB - Upload and share your images.