twinsmagazine.com - Twins Magazine is a publication for parents of Twins. The website offers support, resources, multiples information and a message board for parents of twins and multiples.

tripletconnection.org - The Triplet Connection is a non-profit organization that offers support and information to parents of multiples, in particular supertwins (triplets and quads). The website offers a forum/chat to talk with other parents of supertwins, information on timely topics related to multiples, and a place to subscribe to the Triplet Connection publication.