ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
BeeIMG - BeeIMG is a simple, fast, easy image sharing solution created to fill up your image sharing needs.
Tabday - Tabday is an online image organizing and sharing application.
ImageBam - Free Image Hosting and photo sharing.
ImageShack - Unlimited space to host images, easy to use image uploader, albums, photo hosting, sharing, dynamic image resizing on web and mobile.