Ziff Davis have written an article that compares free cloud services
ZeroPC is a Cloud Content Unifier lets you solve the frustration of having numerous documents, photos, videos, files, social media messages and other digital content scattered across the Web with different passwords to access each. ZeroPC gives you easy, one-stop shopping to access, manage and unify your digital life! Share your content and a full desktop experience through ZeroPC’s “Transferable Desktop”.
Theres even a ZeroPC app that can manage your android photos
OnApp sell software that lets you create your own private/public Clouds, CDNs & Storage systems on your hardware.
You can even use the OnApp Cloud software to create your own PAYG public cloud