Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
The Simple Postcard - Text a photo to mail it as a postcard
Palaround - Meet people you should be friends with.
Mailjoy - Delightfully easy direct mail marketing. A DIY direct mail tool created for marketing and growth teams. Design, mail & track personalized direct mail postcards and letters. Digital marketers use Mailjoy to send data-driven mail campaigns.
Project Fixup - Meet people, not profiles
Felt for iPhone - Handwritten cards for the modern world