Human Animal Interaction Associations and Centers
Center for the Interaction of Animals and Society (CIAS) http://www2.vet.upenn.edu/research/centers/cias/
Center for the Human-Animal Bond http://www.vet.purdue.edu/chab/
Animal Welfare Organizations
The Humane Society of the United States http://www.hsus.org/
Animal Concerns Community http://www.animalconcerns.org/
Society & Animals Forum (formerly Psychologists for the Ethical Treatment of Animals) http://www.psyeta.org/
Animal Welfare Institute http://www.awionline.org/
The Animal Welfare Information Center U.S. Department of Agriculture http://awic.nal.usda.gov/nal_display/index.php?tax_level=1&info_center=3
The International Fund for Animal Welfare http://www.ifaw.org/ifaw/general/default.aspx
Animal Rights Organizations
Animal Concerns Community http://www.animalconcerns.org/
People for the Ethical Treatment of Animals (PETA) http://www.peta.org/
Animal Rights Law http://www.animal-law.org/
Animal Rights FAQ http://www.animal-rights.com/
Association of Veterinarians for Animal Rights http://www.avar.org/
Society & Animals Forum (formerly Psychologists for the Ethical Treatment of Animals) http://www.psyeta.org/