Aha! Go
A home rental and exchange service that covers thousands of locations worldwide and which allows you to book properties ranging from a Paris apartment to a Canadian farm.
http://www.ahago.com/

Bed & Brussels
Book a bed and breakfast or homestay in the Belgian capital.
http://www.bnb-brussels.be/

BudgetTravel.com
Travellers worldwide who want to swap their homes with others can post their offers on this message board.
http://www.budgettravel.com/exchange.htm

Channel 4 - Home from Home
Hints, tips and links on home swapping from the popular British television programme based on the practice.
http://www.channel4.com/life/microsites/0-9/4homes/pg181.htm

CyberRentals
Search for rental accommodation, home exchanges and pet friendly homes all over the globe at this well designed site.
http://www.cyberrentals.com/

Digsville
An international hospitality and exchange club that is fee to list in.
http://www.digsville.com/

ERHomes.com
Features a growing list of homes available for rental or exchange worldwide.
http://www.erhomes.com/canada.htm

Exchange Homes.com
Carries listings for 61 countries worldwide.
http://www.exchangehomes.com/

Flying Home Swap
Home swap and home rental information site for airline staff.
http://www.flyinghomeswap.com/

Google.com
Google's selection of house swapping firms in the United States.
http://directory.google.com/Top/Regional/North_America/
United_States/Travel_and_Tourism/Lodging/Home_Exchanges/

Green Theme International
A European company that specializes in home exchange vacations worldwide.
http://www.gti-home-exchange.com/

Holiswap
Holiswap had a limited number of properties on their books when we visited, but you do not pay your $20 fee until after you have exchanged.
http://www.holiswap.com/

HoliSwaps
Pay a modest membership fee and exchange as many times as you want in a year.
http://www.holiswaps.com/

Holswap
The website boasts almost 40 million visitors since 1999.
http://www.holswap.com/

Holi-Swaps.com
Over 10,000 Members in more than 67 Countries worldwide waiting to hear from you.
http://www.holi-swaps.com/

Home Base Holidays
Canadian property exchange specialist.
http://www.home-trading.com/

Home Base Holidays
Up-to-date listings, customer service by phone and mail, and a choice of membership options.
http://www.homebase-hols.com/

Home Exchange.com
This site boasts over 5,000 homes worldwide.
http://www.homeexchange.com/

Home Exchange International
A well known home exchange facilitator that has properties in over 60 countries on its books. The "About" section has some great articles on house swapping for beginners.
http://www.singleshomeexchange.com/

Home Link International
Another firm offering in excess of 12,000 properties in 50 countries around the world. The firm has been mentioned in the national press and some of its members featured in the UK television show about home swaps called "Home from Home".
http://www.homelink.org.uk/

Homestay Accommodation UK
Whether you are planning to study or just take a vacation in the UK, these guys have accommodation to suit your needs within a friendly English home.
http://www.homestay.force9.co.uk/

Homestay Toronto.biz
Details of a Toronto family who offer students and women a warm, safe and affordable housing.
http://www.homestaytoronto.biz/

Hometimeswap.com
An agency specializing in up-market, international house swaps and vacation rentals.
http://www.hometimeswap.com/

HouseWeb Holidays
Home exchange directory.
http://www.houseweb.co.uk/prop/exchange.html

International Home Exchange Network
A popular American service that includes members worldwide.
http://www.ihen.com/
http://www.homexchange.com/

International Mountain Explorers Connection
Promotes responsible and sustainable tourism in the mountainous regions of the world by arranging homestay programs for IMEC members.
http://www.hec.org/

Int-a-let.com
Membership of this home exchange site opens up a host of holiday possibilities all over the globe. However, you will have to join before you can view any properties.
http://www.int-a-let.com/

Intervac International
Intervac claims to have invented the home exchange concept, and today boast over 10,000 members in 52 countries worldwide.
http://www.intervac.com/
http://www.intervac-online.com/
http://www.intervac.org/

Intervac - Canada
http://www.intervac.ca/
http://www.intervac.com/
http://www.intervac.org/

Intervac - Ireland
http://www.intervac.org/ireland/
http://www.intervac.com/
http://www.intervac.org/

Intervac - New Zealand
http://www.intervac.co.nz/
http://www.intervac.com/
http://www.intervac.org/

Intervac - UK
http://www.intervac.co.uk/
http://www.intervac.com/
http://www.intervac.org/

Intervac - USA
http://www.intervacus.com/
http://www.intervac.com/
http://www.intervac.org/

Kosherhomeexchanges.com
Swap your home with other families who keep a kosher home.
http://www.kosherhomeexchanges.com/

Landfair Home Exchange Club
A home exchange club that offers a customer matching service, hospitality exchange, youth hospitality exchange, non-reciprocal exchanges, homestays and homesitters.
http://landfair.com/

Latitudes Home Exchange
Custom matching with a range of properties in 30 countries.
http://www.home-swap.com/

Let's Homestay
Offers homestay and farmstay holidays, mother and child programmes, volunteer programmes, and more for foreigners wishing to experience the real New Zealand.
http://www.farmstay.co.nz/

Matching Houses.com
International home exchange service aimed at people with disabilities or with accessible homes to offer.
http://www.matchinghouses.com/

Only in America
North American and Caribbean home swapping service.
http://www.exchangehomesoia.com/

Room for Room
A global room exchange website focusing on the needs of students, low budget travellers and other young people all over the world.
http://www.roomforoom.com/

Sabbatical Homes
"Helping academic communities worldwide to find or list houses or apartments for rent, exchange or house-sit when on sabbatical leave, research trip, exchange program, relocation or vacations".
http://sabbaticalhomes.com/

Seniors Home Exchange
Lots of high quality listings, many with pictures, on this site. A point worth noting is that a number of the exchanges include the use of the family car into the bargain. The site also facilitates exchange hospitality vacations. For over 50s only.
http://www.seniorshomeexchange.com/

SunSwap
Home swap site that charges a modest annual fee for accessing its database.
http://www.sunswap.com/

Swap-and-Go.co.uk
British firm offering home exchanges, homeshares, home swaps, vacation rentals and vacation exchanges.
http://www.swap-and-go.co.uk

Swap and Stay.com
Your guide to free holiday accommodation around the globe.
http://www.swapandstay.com/

Teachers Travel Web
Home exchange and home hosting exclusively for teachers.
http://www.teacherstravelweb.com/ezine.html

Trading-Homes.com
Apparently, this company has been mentioned in the Wall Street Journal, Frommer's Budget Guide and New York Times, among other publications.
https://www.trading-homes.com/

Travel Choice
Aussie home swaps, rentals and homestays.
http://www.ans.com.au/~sydney/pages/home.htm

Travel Choice
Australian site specializing in rentals, exchanges and homestays worldwide.
http://www.maxlink.com.au/homeswap/

Unique Home Stays
Enjoy intimate and luxurious stays in exclusive private homes worldwide.
http://www.uniquehomestays.com/

Vacation Home Exchange
Weblog with lots of articles about house swapping, tips on successful swapping, and a free newsletter.
http://vacationhomeexchange.blogspot.com/

VacationHomes.com
Search from thousands of properties listed on this US site, which also offers a list of staff reviewed accommodations. A members-only site, so you will have to sign up before you can view anything.
http://www.vacationhomes.com/

Wolsey Lodges
A collection of luxury homes in Europe offering superior bed and breakfast accommodation.
http://www.wolseylodges.com/

Worldwide Classroom
Advice on how to behave when you are staying as a guest in someone's house.
http://www.worldwide.edu/planning_guide/Lodging_and_Homestay/index.html