Rocky Mountain Alley Cat Alliance
- Information on pet adoption, feral cat trapping, and neuter/spay. Links to rescue resources, and message board.
- http://www.rmaca.com/

Maxfund Animal Adoption Center
- No-kill animal rescue shelter and animal health organization. Pictures of cats and dogs, steps for adopting a pet, frequently asked questions, events, and volunteer opportunities.
- http://www.maxfund.org/

Denver Dumb Friends League
- Dedicated to the rescue, protection, teaching, nurturing and reuniting of all animals, detailing league mission, pet adoptions, lost and found, donations, store, educational programs, and kids information.
- http://www.ddfl.org/