For fun:

• A very popular site! with a quizz and loads of pics, links and infos: The Cat Basket
• The Cat Olympics : the De-Cat-Thlon (including Madly-Running-Through-The-House-For-No-Apparent-Reason Dash), the Gymnastic Events, the Team Sports (like I Want In/I Want Out Relay) and Individual Events.
• "Internet for Cats: A Guide to How You and Your Cat Can Prowl the Information Highway Together": includes Bubbles' Cats From Outer Space FAQ, Bubbles' Internet Human Codes, Is Windows 95 for Your Cat?, Cat Net Surfer Tips, and links
• Want to learn what an Halloween cat is, or a basket case, or the monster-under-the-blanket?: check in the CatDictionary
• Want to understand your cat? Here is another dictionary.
• Want to send a cat Felix-email-card or check the cat calendar? (unavailable at the moment)
• Why Cats are Superior to Space Aliens
• The Virtual Cathouse with "Welcome to the Zoo", cartoons with cats
• The Cat page with the Feline-L Kitty Carousels
• David Stevenson's cat page (articles, the catcodes, pictures...)