Dropbox - Online Sync and File Sharing
imgix - Real-time Image Processing. Resize, crop, and process images on the fly, simply by changing their URLs.
Mega - Secure File Storage and collaboration
Cloudimage - Cloudimage.io is the easiest way to resize, store, and deliver your images to your customers through a rocket fast CDN.
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
Sirv - Dynamic image processing, hosting and rich-media for retailers and eCommerce.