English Cats: Alphabetical lists of over 150 memes (so far).
Latin Cats: Because I used to teach Latin. :-)
Use Your Brain: Cats inspired by Gardner's intelligences.
#YesICan Cats: Inspired by Laura Ritchie's self-efficacy book.
There is also a Flickr album:
Along with a Pinterest Board:
And there's a "calendar cat" with a new cat each day: