Trustroots - Travellers community for sharing, hosting and getting people together.
RentHoop - Tinder for finding roommates
BeWelcome - Open your door to the world!
Housing Anywhere - The international student housing platform
Hospitality Club - Free network of people around the world who offer free accommodation, advice and help when they are traveling - hospitality exchange. Free membership.
Campus Cribz - College student rentals and roommate matching