The Humane Society of the United States They lobby to help pass laws and help enforce existing laws pertaining to animals. Putting Animals First!
Smiling Dog Farms A sanctuary for dogs. These guys take the abused, neglected and rejected that would be killed at the shelter. Good friends of mine doing a rocking job.
Petfinder.com End the Shelter Dilemma... Adopt a homeless pet. You'll be my hero!
ASPCA The name says it all - They Prevent Cruelty to Animals...
PETA They're controversial, but I like em.