BeWelcome - Open your door to the world!
Airbnb - Book unique places to stay and things to do.
Trustroots - Travellers community for sharing, hosting and getting people together.
Roadtrippers - The ultimate road trip planner to help you discover extraordinary places, book hotels, and share itineraries all from the map.
Couchsurfing - CouchSurfing is your ticket to explore the world -- from the road or from your own home.
HopBucket - HopBucket is a platform for planning trips and sharing travel experiences.