National

American Humanist Association:
http://americanhumanist.org

Secular Student Alliance:
http://secularstudents.org

Society for Humanistic Judaism:
http://www.shj.org

Secular Coalition for America
http://secular.org 

American Ethical Union (Ethical Culture)
http://www.aeu.org/

Humanism in the Unitarian Universalist Movement
http://www.uua.org/visitors/beliefswithin/6642.shtml 

Richard Dawkins Foundation for Reason and Science
http://richarddawkins.net/

Council for Secular Humanism
http://www.secularhumanism.org/

Local

Humanist Association of Massachusetts
http://americanhumanist.org

Ethical Society of Boston
http://www.bostonethical.org/

Workmen’s Circle of Boston
http://www.workmenscircleboston.org/

Kahal B’raira: Community of Choice
http://www.communityofchoice.org/index.html

Greater Worcester Humanists
http://worcester.humanists.net/site/

Center for Naturalism
http://www.naturalism.org/

Boston Atheists
http://bostonatheists.org/

Educational/Philosophical/Political

Online Courses on Humanism:
http://humanisteducation.com/

What is Humanism?
http://www.americanhumanist.org/humanism/whatis.php

Definitions of Humanism:
http://www.americanhumanist.org/humanism/humanismdefinitions.php

Explanations of/Essays on Humanism:
http://www.americanhumanist.org/humanism/on_humanism.php

Essays on Issues in Humanism:
http://www.americanhumanist.org/humanism/humanist_views.php

Interested in Political Activism?
http://www.secular.org/subscribe/

Experienced/Aware of Bias against Humanists or other non-theists? Report it!
http://www.secular.org/adsn.html

Humanist weekly E-zine
http://humaniststudies.org/enews/

Humanist Charities: working to make a world that will never be perfect a better place.
US: http://www.humanistcharities.org
International: http://www.hivos.nl/english

Humanism and Bioethics at the United Nations:
http://www.iheu.org/bioethics