The People for the Ethical Treatment of Animals (PETA) Foundation is a UK-based charity dedicated to establishing and protecting the rights of all animals.
A volunteer-run organization dedicated to promoting the welfare of wild, companion, farm and laboratory animals throughout the world
World Animal Protection
Protect Animals Around The World
Fighting Animal Abuse & Promoting a Cruelty-free Lifestyle
Animal Rights Action
The knowledge and tools you need to help stop animal cruelty.
Cruelty Free International
Working to end animal experiments worldwide
Care2 Petitions (The Petition Site)
Animal Rights Petitions
Humans Defending Animals From Other Humans
The Body Shop
Ban Animal Testing Campaign
World Wildlife Fund