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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.
Picorator - Picorator is a simple yet powerful image sharing application developed by online communities.
ImageBam - Free Image Hosting and photo sharing.
imgbox - Imgbox is a free image hosting service.