Android: In the future, paper (much like running) will only exist for recreation, for fun. In the meantime, we still have to deal with annoying contracts, memos and receipts. All of which can be scanned instantly and uploaded directly to Dropbox, Evernote and more with Scanbot, previously available for iOS but now on Android as well.
This app isn't the first of its kind, but its one of the simplest. Simply point your camera at a document and it will scan it, and do some automatic perspective correction. From there you can upload it to a number of cloud services, including Dropbox, Evernote, Box, Google Drive and OneDrive.