Animals Without Frontiers

International animal and nature organization. News, petitions, campaigns, and an Internet based animal identification system.
http://www.aniweb.org/

Born Free

International wildlife charity working to prevent cruelty and alleviate suffering. News, educational materials, photos, FAQ, and information about ways for individuals to become involved.
http://www.bornfree.org.uk/

United Animal Nations

A national non-profit animal advocacy organization whose mission is to protect animals in danger or need and to focus global attention on their plight to create a more humane world.
http://www.uan.org/

Animal Welfare Institute

Non-profit charitable organization founded in 1951 to reduce the sum total of pain and fear inflicted on animals by humans. Site includes information about programs, publications, and news.
http://www.awionline.org/

Humane Society and Animal Welfare Ring

Links to animal shelters, humane societies, rescue and animal welfare organizations.
http://o.webring.com/hub?ring=humane

Companion Animal Welfare Council

Conducts and publishes independent research and studies studies into the welfare, care, and treatment of companion animals and their role within society.
http://www.cawc.org.uk/

Care For The Wild

International wildlife charity dedicated to protecting animals from cruelty and exploitation. Includes fact sheets, news, information about current projects, and an online shop.
http://www.careforthewild.org/