TwinStuff.com - Bulletin boards, twin games, photo gallery, information for parents, TV and movie twins, twin events, and information.

Twinsworld - Offerings include a twin casting agency, twin events, reunion of twins placed for adoption or separated at birth, message boards, links, photos, contests, and research.

BellaOnline Twins - Information on vanishing twins, events, scholarships and twins in school.

Facts About Multiples - Information on twins, triplets, quadruplets, quintuplets and higher order multiples. Features a database of multiple birth families, statistics, basic information on twinning, world records and information on fakers.

Incredible Births - Site designed with emphasis on multiple births, such as twins, triplets, quadruplets, quintuplets.

The International Twins Association - A non-profit, family-oriented organization to promote the spiritual, intellectual, and social welfare of twins and multiples throughout the world.

Twin Connections - Twin Connections celebrates the unique and mysterious bond between twins by providing a place for twins, and their families and friends, to share and read twin stories and photos, learn interesting twin facts and news and join an online twin community.

Twins by Twins - This site is built for all those that want to learn more about twins and is dedicated to those that are twins and proud of it.

TwinsRealm.com - Mirror twins from Australia share photos, twin stories, links and information on twin festivals and celebrations.