Services we know:
National Shared Housing Resource Center – A clearinghouse of information for people looking to find a shared housing organization in their community or to help get a program started. http://nationalsharedhousing.org
Other Services – if you use one of these services, please let us know about your experience.
Rooms & roommate database since 1999: http://www.easyroommate.com/
The “Web’s most popular roommate finding service: http://roommates.com/
AirBnB – Rent unique places to stay from local hosts in 190 countries: https://www.airbnb.com/