Alcoholics Anonymous (AA)
http://www.alcoholics-anonymous.org/en_information_aa.cfm -homepage
http://www.alcoholics-anonymous.org/en_find_meeting.cfm -to find a meeting

Al-Anon / Alateen
http://www.al-anon.alateen.org/- homepage
http://www.al-anon.alateen.org/meetings/meeting.html- to find a meeting (US & Canada)

Cocaine Anonymous (CA)
http://www.ca.org/ - homepage
http://www.ca.org/phones.html- to find a meeting

Narcotics Anonymous (NA)
http://www.al-anon.alateen.org/meetings/meeting.html- homepage
http://portaltools.na.org/portaltools/MeetingLoc/- to find a meeting

National Association of Children of Alcoholics

http://www.nacoa.org

Co-Dependents Anonymous (CoDA)
http://www.codependents.org/meeting-search-english.php- to find a meeting

National Association of Addiction Treatment Providers, (NAATP)
http://naatp.org/ - homepage

American Society of Addiction Medicine (ASAM)
http://asam.org/ - homepage

National Institute on Drug Addiction (NIDA)
http://www.nida.nih.gov/

National Institute on Alcohol Abuse and Alcoholism (NIAAA)
http://www.niaaa.nih.gov/

Narcotics Anonymous
http://www.na.org

American Association of Nurse Anesthetists Peer Assistance
http://www.aana.com/peer

Cocaine Anonymous
http://www.ca.org

Gamblers Anonymous
http://www.gamblersanonymous.org

Sexaholics Anonymous
http://www.sa.org

Interfaith Sexual Trauma Institute
http://www.csbsju.edu/isti

National Clearinghouse for Alcohol and Drug Information, (SAMHSA)
http://www.health.org

National Institute of Alcohol Abuse and Alcoholism,  (NIAAA)
http://www.niaaa.nih.gov

National Institute of Drug Abuse,  (NIDA)
http://www.nida.nih.gov