International Police Association
- This organization includes a Hospitality Club for retired and active law enforcement officers.
- http://www.ipa-usa.org

Global Freeloaders
- Online community matching guests and hosts for accommodation exchange. Testimonials, FAQs, and a member database.
- http://www.globalfreeloaders.com

Friendship Force
- Nonprofit cultural exchange organization promoting friendship and goodwill through an extensive program of homestay exchanges since 1977.
- http://www.friendshipforce.org

Couch Surfing
- Network connecting travelers with locals offering accommodations and advice. Members can be vouched for by other members or verified by paying a fee. Includes information about the organization, searchable database, message board, and chat room.
- http://www.couchsurfing.com

Hospitality Exchange
- Publishes a paper membership directory twice a year, there is a membership fee.
- http://www.hospex.net

Hospitality Club
- Volunteer members offer free accommodation and travel help and leave comments in each others' profiles after the stay. Includes a forum, chat, and wiki travel guides.
- http://www.hospitalityclub.org

MeetURplanet
- Australia-based club. Registration is free but paid membership is required to contact other members.
- http://www.meeturplanet.com

Place2Stay
- Offers a worldwide network of private accommodations. Includes information about accommodations, a forum, FAQ and chat room.
- http://www.place2stay.net

Pasporta Servo
- For people speaking Esperanto. There is a membership fee.
- http://www.tejo.org/ps/

Welcome Traveller Network
- Members pay a nominal fee for bed and breakfast when visiting other members. There are several interest groups.
- http://www.welcometraveller.org

Warm Showers List
- List of cyclists who offer their hospitality towards other touring cyclists.
- http://www.rogergravel.com/wsl/vh_for_a.html

Women Welcome Women World Wide
- For women only. Aims to foster international friendship by enabling women of different countries to visit one another. There is a membership fee.
- http://www.womenwelcomewomen.org.uk

Teachers Travel Web
- Open to all educators. Site also includes home exchange listings.
- http://www.teacherstravelweb.com

Servas International
- Oldest hospitality exchange organization. Website includes a newsletter, FAQ and list of countries. There is a membership fee and new members are interviewed by Servas representatives.
- http://www.servas.org/

Lesbian & Gay Hospitality Exchange International
- Network of lesbians and gay men from around the world who offer their hospitality to other members.
- http://www.lghei.org