Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Picaboo - Picaboo is a web-based image publishing and printing service that allows you to create personalized photo books, cards, and scrapbooks.
Flickr - image and video hosting website
Juicebox - Spectacular HTML5 Image Galleries Made Easy
Photobucket - Photobucket offers image hosting and free photo and video sharing.
Walmart Photo - Walmart Photo is a fun way to turn your pictures into art and embed it into everyday goods.