Twins Network
A resource for understanding twins and sharing information. Surveys, facts, news, trivia, links.

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.

TwinMajority.org
From 2127, most babies will be twins. This site explains why evolution predicts this.

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