Easy Roommate

Matching service for some US cities. Free to preview possibilities.
http://www.EasyRoommate.com

Flat-Sharer

Pay service to locate flatshares in the UK.
http://www.flat-sharer.com/

Roommate Locator

Offers articles dealing with roommate and rental situations.
http://www.RoommateLocator.com

Share Rent

Covers the US and Canada. Free to browse on their bulletin board or search listings.
http://www.sharerent.com

Roommate Express

Looks using your online profile, you can submit payment at their office or through the website. Many US cities served.
http://www.roommateexpress.com/

Roommate Finders

A flat fee promises careful screening with your compatibility factors and a "no turkeys" guarantee. NYC area only.
http://www.roommatefinders.com/

Flatmate Selection and Security

Accommodation agency in Australia offering to pre screen potential flatmates, or advertise share accommodation.
http://www.flatmate.com.au

Find A College Roommate

Post an ad to find a college roommate within the US for a small fee or browse the bulletin board for free.
http://www.campusroommates.com

Housepals

Search engine for bedsits, flatshares, houseshares and roommates in USA, UK, Australia, Canada and Ireland.
http://www.housepals.co.uk

Roomatesville

An apartment and roommate finder, serving the USA and Canada.
http://www.roommatesville.com

Roommate Nation

Find a roommate to share housing with anywhere in the U.S.A.
http://www.roommatenation.com/

Find a Housemate

Service devoted to house and flatsharing, worldwide. Advertise for a new roommate or search for accommodation.
http://www.findahousemate.com

Roommates.com

Nationwide US roommate matching service. Free to preview matches.
http://www.roommates.com

RoomVoter.com

Free site dedicated to helping US room seekers find new roommates as well as helping room posters screen new applicants.
http://www.roomvoter.com

RoomYou.com

Provides an Internet rental housing service to find roommates in USA.
http://www.roomyou.com

LDSroomie.com

Find other LDS roommates in your area. Search by city and state. Free basic membership.
http://ldsroomie.com

Roommates And Rooms

Free roommate finder service. Create a listing to contact roommates and rooms for rent in the USA.
http://www.roommatesandrooms.com

Roommate Marketplace

Find and post roommates and rooms for rent in all cities. Interactive website to find suitable roommates.
http://www.metroroommates.com

UK Roommate Finder

This UK site allows tenants to look for a spare room and also landlords can advertise their rooms. The registration process is free
http://www.roommateclick.co.uk

Roomie Match

Roommate matching by personality and lifestyle preferences as well as demographics. Serves all large US and Canadian cities. Free to submit a profile.
http://www.roomiematch.com/

Roommate

Free search via forums. Includes tips on picking the right roommate and negotiating conflict.
http://www.roommateroommateroommate.com

MoveOnIn

Provides roommate searching throughout the US. Can preview potential matches before paying. Picture uploading available.
http://www.moveonin.com/

Find Roommates with Nextroommate.com

For those who need a room or have a room to rent in the UK. Free service includes roommate profile with photos.
http://www.nextroommate.com

Veggie Roommate

Free roommate finder services for vegetarians.
http://www.veggieroommate.com/