imgix - Real-time Image Processing. Resize, crop, and process images on the fly, simply by changing their URLs.
Icons8 Background Remover - Quickly remove the background from any photo
Cloudimage - Cloudimage.io is the easiest way to resize, store, and deliver your images to your customers through a rocket fast CDN.
IMG.LY - Power Your Apps with IMG.LY | The Leading Provider of Design, Photo, and Video Editing SDKs
Sirv - Dynamic image processing, hosting and rich-media for retailers and eCommerce.
ClippingMagic.com - Remove image backgrounds online. Make backgrounds transparent, white, etc. Edit, crop, rotate, fix colors, add shadows, all you need for great photos!