Alley Cat Allies
SpayUSA
PETA
Animal Legal Defense Fund
Humane Society of the US
Petfinder
Petshelter Network
PetPlanet.com
PetWalk
Feral Cat Coalition
Feral Cats - Rescue, Care and Rehabilitation
Caring for Cats
The Pet Center - The Internet Pet Hospital
Caring for Cats
The Pet Loss Grief Support Website & Candle Ceremony
The Internet Lost and Found

Delta Society
Best Friends Animal Sanctuary
Hugs for Homeless Animals
PetNet
WorldAnimalNet
MyApartmentMap