Telegram Stop
Like Doc Brown's message to Marty from 1885 to 1955, you can now send honest-to-goodness telegrams across the ocean or across time with Telegram Stop ($6). This ingenious online service allows you to type in your message — complete with -(STOP)- for periods and full stops — and send it on a vintage-looking card to anyone you want at any (current or future) time you want, replacing a simple electronic communiqué with something much more permanent and memorable. You can even upload photos to be printed and sent along with your message. Take that, MMS.