Alumni.NET - - Lists schools across the world. Claims over 3 million members.
AussieSchoolmates - - Lists schools across Australia. Free to use. Claims to have over 29,000 members.
Canadian Alumni Norway - - For Canadian university graduates living in Norway and Canada. Free registration. Fees for event participation.
Classdays.com - - Lists US schools. Free registration. Fees for use of advanced features including messaging. Claims over 6 millions members.
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.
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.
Graduates.com - - Lists over 180,000 schools, colleges and universities from over 200 countries. Free registration and browsing.
Oldfriends.co.nz - - The best way to find old schoolmates, workmates and people you know in New Zealand. Claims 388,540 members.
Our Class Online - - Provides tools that quickly empower you and your classmates to create your own reunion on the internet.
Reunion Announcements - - Lists US and Canadian class reunions. No registration required. Free posting.
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.
Schoolbuddies.com - - Lists US and Canadian schools. Free registration.
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.
Yoshioris Alumni Network - - School alumni and class reunions in over 120,000 schools nation wide.