Dropbox - Free Download Dropbox to your computer and your device and you can easily transfer your pictures, documents, and videos.
Springpad - Free This is one of my favorite apps. In my job I work on several different computers. This app and website allow me to store my favorite websites online. That way I can access them from my iPad or any computer. It also has "notebooks" so that I can keep things organized.
Evernote - Free Keep yourself organized on all of your devices. Evernote is a great place to store lists, websites, and more so you can look at them on any device.