Hospitality Club - Free network of people around the world who offer to exchange hospitality, accommodation, advice and help when they are traveling. Pasporta Servo - For people speaking Esperanto. Servas - Largest and oldest club, founded in 1949 as a peace organization. There is a fee to join and membership applications cannot be made online. Teachers Travel Web - Open to all educators.
Site also includes home exchange listings.
TravelHoo - Web based accommodation network. By exchanging hospitality with other travelers, you can stay for free all over the world. Warm Showers List - List of Internet cyclists who offer their hospitality towards touring cyclists. Aims to foster international friendship by enabling women of different countries to visit one another. There is a membership fee.