Free cloud storage with Copy--works similar to Dropbox -- free and 15 GB of storage. (I use Dropbox and see no need to change, but this has an app that you can install on any device and, apparently, is not in conflict with Dropbox). Might be worth a book.
I personally LOVE Dropbox and here's a great review of this cloud storage tool. You can share files easily and files are automatically updated as you work on them from any computer. I give this my HIGHEST recommendation.
I just used this site/download with an iPod project in my classroom. It is probably the most important site I have found in years. The primes is simple and there are probably pleanty of other sites like it but.... WOW.
You can drop your files into the dropbox and they are saved to the "cloud". Then amazingly they are on every computer ( or iPod) you have linked to the account. I entered my account info on the student iPods and made a folder for each student, when they were done with a project, they saved it to the folder. The great thing about this was i could access their assigment from anywhere, my home computer, my iPhone, another iPod in the class, the smart board...it was limitless, I could share it with anyone, no matter where I was...how powerful. I also made a folder of "mrs. Kondrick's resources" where I put videos, audios, assignments, rubrics etc, and then they could watch them/use them at their own pace ( so ethnic that works well with our individualized daily 5 reading block.
gClassFolders (google shared public template) looks like it has a lot of potential for English teachers. Student has to 'drag' the dropbox folder to their desktop, but they can put work 'view' and 'edit' in for the teacher as well as final copy. Check it out--click on the video to see a quick, clear demonstration.
Notability is an iPad app for note taking that allows collaborative (or not) notetaking with sharing options. Plus it works with Dropbox (cloud storage)