Ubuntu One (Ubuntu One Files for iPhone)
Ubuntu’s free cloud storage service, Ubuntu One, extends to iOS with Ubuntu One Files. We like it for what it does -- which is extend basic file storage from the Ubuntu desktop (or any desktop) to the cloud. Ubuntu One is free with a 5-GB storage capacity, accessible over the Web. With Ubuntu One Files for iPhone, it’s now fast, free and easy to download and upload those files between the service and your iOS-based device. The app also makes it easy to transfer photos, seamlessly, from your iPhone to Ubuntu One -- similar to the way Apple’s own iCloud service for photo streaming works. It is also interoperable with other apps and services, including Evernote and Dropbox, on the iPhone. It's available as a Web service, as well as on Ubuntu Linux and on iOS.
On a scale of 1-10: 5