Flickr - image and video hosting website
CloudTop - CloudTop is an online cloud web desktop.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
eyeOS - eyeOS is a web desktop following the cloud computing concept that seeks to enable collaboration and communication among users.
ImageShack - Unlimited space to host images, easy to use image uploader, albums, photo hosting, sharing, dynamic image resizing on web and mobile.
Oneye - Oneye is a takeover of the legacy series one from the eyeos project.