The Cat Fanciers' Association (CFA)
The Cat Fanciers' Association website has lots of pictures, as well as information on cat breeds, cat care, upcoming cat shows, and much more.

Breed Directory from Animal Planet

Provides a description of each breed plus a questionnaire that helps determine what breed might be best for you. 
   
American Association of Feline Practitioners
The AAFP is like the American Medical Association for cat doctors, and has lots of good information regarding feline health


Heartworm Society
Everything you ever wanted to know about heartworm disease can be found here!


Revolution
This site is sponsored by the makers of Revolution: Zoetis Animal Health. You will find valuable information about protecting your cat from fleas, heartworms, earmites, hookworms and roundworms. 

 
Cat Lover's On-Line Community
Catster is a neat site for cat lovers to share pictures, stories, and information.


Cornell Feline Health Center
Numerous health topics and you can purchase easy to understand videos that are step by step instructions for trimming nails, brushing teeth, giving oral medications, and much more.
 

Cat Trees
Find ways to enrich the life of your indoor cat. Sleek designs.


Chronic Renal Failure 
Information on kidney problems a very common problem in older cats.


Diabetes
Here you can learn valuable information about taking care of your diabetic cat.


Cat Wellness News
This site has information regarding feline issues as well as additional sites of interest.


A National Initiative to Champion the Cat
This sites vision: Our Vision is to raise the level of care and welfare of cats by cat owners - one that any owner will embrace through the human-animal bond and can achieve - supported by the highest quality veterinary care, preventative medicine, and cat specific products.


Winn Feline Foundation
The Winn Feline Foundation is a non-profit organization established in 1968 that supports studies about cat health. Projects funded by Winn provide information that is used every day to treat cat diseases.