I have just discovered a really fun app called Red Stamp. It is a free service that allows you to send quick notes, invites, greetings to friends on electronic stationary. You can add your own photos to some cards, and other cards can be purchased for $0.99. If you wanted to send a real card via the mail you can do that too for a small fee.
The notes are so chic and great little pick me ups for you and your friends and family. Who wouldn't want to get such a cute note on their email.