American Intercultural Student Exchange (AISE)
Foundation which arranges exchange programs for high school students from around the world. Site provides forms and FAQs for host families and interested students, as well as description of programs, area representative resources, student profiles, and related links.

University College Dublin Students' Union
Provides information about its activities and events as well as its services and advice, links and resources

CBNA - Collegiate Business Networking Association
Promotes the free exchange of information, insight, knowledge, and ideas among students interested in business and entrepreneurship.

Youth to Youth International
Umbrella for thousands of organizations in 36 U.S. states and 13 countries which advocate the advantages of a healthy, drug-free lifestyle for middle and high school students.

The Student Center
Web community for college students, high school students, and teens. Plenty of useful information, entertainment, and an entire Student HUB section dedicated to students meeting other students.