The first one I managed to pick out was Simons Cat.
I'm old school comic strip in my fictional cats, but of course I saw Simon's Cat, once more asking for food. But there's also:
Felix the Cat
Krazy Cat/Cicero's Cat
Bill the Cat (from Bloom County)
Top Cat
The Cat from Itchy and Scratchy (I don't watch Simpsons, so I don't know which he is)
Sylvester
Tom (of Tom and Jerry< with a finally dismantled Jerry next to him . . .Yay!)
Garfield
Nermal (from Garfield)
The cat from Ren and Stimpy (again, I know not which one)
Penelope (cat who looks like a skunk in Pepe Le Pew)
Bucky Katt (from the hilarious Get Fuzzy)
Cat from Mutts?
A couple of vintage Disney cats from their cartoons
I would have added Supergirl's cat Streaky, and DEFINITELY Rufus' kitty in Gasoline Alley (picture below).