Inkly - send real printed cards with your own handwriting inside
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Skip The Stamps - Snap or upload a pic to send a physical postcard in minutes
Babble - A more personalized social network
Pitch Cards - I've 99 problems and I'm ready to pitch one!
Palaround - Meet people you should be friends with.