AlumiExplorer.com
   Lists US high schools. Completely free.
   http://www.alumniexplorer.com/ae/default.asp

Alumni Archive
   Hosts reunion sites for some schools in Florida, Maryland, Virginia, and Washington. Free registration.
   http://www.alumniarchive.net/

Alumni Find
   List schools across the world. Completely free.
   http://www.alumni-find.com/main/

Alumni Society/
   Lists 351 schools. Free registration.
   http://www.alumnisociety.com

Alumni.NET
   Lists schools across the world. Claims over 3 million members.
   http://alumni.net

AussieSchoolmates
   Lists schools across Australia. Free to use. Claims to have over 29,000 members.
   http://www.aussieschoolmates.com.au

ClassMates
   Lists US and Canadian schools, both domestic and international. Free registration to see who is listed. Subscription fees to send personal messages and use other features.
   http://registration.classmates.com/registration/;jsessionid=H5UCP0AQ4VVM0CQKWZUSPJQKBK1GUIV3?reg=null

Classdays.com
   Lists US schools. Free registration. Fees for use of advanced features including messaging. Claims over 6 millions members.
   http://www.classdays.com/

Club Ghana
   Lists schools from Ghana. Free registration. Claims over 12,000 members.
   http://www.clubgh.com

Find old friends in Australia & New Zealand
   Lists all type of organizations around Australia and New Zealand. Free registration to view most information. Yearly fee to send and post messages and use other features. Claims over 1 million members.
   http://www.schoolfriends.com.au

Graduates.com
   Lists over 180,000 schools, colleges and universities from over 200 countries. Free registration and browsing.
   http://graduates.com

LostSchoolFriends.com.au
   Australia's first free to use old school pupil directory.
   http://www.lostschoolfriends.com.au/index.asp

Oldfriends.co.nz
   The best way to find old schoolmates, workmates and people you know in New Zealand. Claims 388,540 members.
   http://www.oldfriends.co.nz/

Our Class Online
   Provides tools that quickly empower you and your classmates to create your own reunion on the internet.
   http://www.ourclassonline.com/

Reunion Announcements
   Lists US and Canadian class reunions. No registration required. Free posting.
   http://www.reunionannouncements.com

Reunion.com
   Lists US and Canadian high schools. People search available as well. Free registration to see who is listed. An annual fee is required to send personal email and use other features. Claims over 22 million members.
   http://www.reunion.com/

SchoolNews.com
   Lists US and Canadian high schools and colleges. Free registration to view basic listings and post to message boards. One-time listing fee to send personal messages and use advanced features.
   http://www.schoolnews.com/

Schoolbuddies.com
   Lists US and Canadian schools. Free registration.
   http://schoolbuddies.com/index.html

The Alumni Highway
   Links to school reunion and alumni pages.
   http://www.alumnihighway.com/

Yoshioris Alumni Network
   School alumni and class reunions in over 120,000 schools nation wide.
   http://us.yoshioris.com