I am encouraging all of my students to use the onsite application DropBox. This application is simple to use and it acts like an online jump drive that you can access anywhere there is an Internet connection.
All you have to do to get started is go to this website: www.dropbox.com

Here is a link to the instructions of how DropBox works: DropBox Directions



Also, one of my students just showed me a really cool online paint program called Sumo Paint and you can see that online application here: www.sumopaint.com