Official site of the National Organization of Mothers of Twins Clubs (NOMOTC), a nation-wide support group for parents of twins and higher order multiple birth children. NOMOTC's purpose is to improve public awareness of the needs of multiple birth children by fostering the development of local support groups, enhancing the quality of educational materials available to parents and educators, and by cooperating with and participating in research projects which involve twins and/or their families.

► Promoting rights and services for victims of crime and crisis everywhere: NOVA is a non-profit organization of victim and witness assistance programs and practitioners, criminal justice agencies and professionals, mental health professionals, researchers, former victims and survivors, and others committed to the recognition and implementation of victim rights and services.

The Secular Web is the most comprehensive online resource about atheism, agnosticism, nontheism, secular humanism, rationalism, freethought, naturalism, materialism, skepticism, secularism, and other views of nonbelievers. It is owned and operated by Internet Infidels, Inc., a nonprofit educational organization devoted to the defense and promotion of naturalism, the hypothesis that nature is a closed system in the sense that it is not affected by anything outside of it.

The National Organization for Women (NOW): Taking action for women's equality since 1966. News from NOW: stories about women and feminism, action alerts, and more

The National Organization of Restoring Men is a non-profit support group for men who have concerns about being circumcised, are considering foreskin restoration, or are in the process of restoring their foreskins.