BeWelcome - Open your door to the world!

Postsnap - Postsnap's iPhone app is the best, free postcard creator. Make & send real printed postcards, greeting cards, invitations and announcement cards using your own photos.

Trustroots - Travellers community for sharing, hosting and getting people together.

Fizzer - Send a personalised postcard with your photos. Holiday cards, thanks, greetings, invitations, birthdays and announcements.

Couchsurfing - CouchSurfing is your ticket to explore the world -- from the road or from your own home.

Stampix - Photo printing in a fast, easy & ecological way.