Hospitality Club

Hospitality Club is an online hospitality service where you can register if you are interested in hosting other people from around the world and staying with people on your travels. No money is involved - guests and host do not pay each other. Membership of the club is free as well. After using the service, you can comment about your host or guest.

http://www.hospitalityclub.org/

Also see: Pasporta Servo, Servas Open Doors