A warrior cats roleplay site called Moonrise, which, unfortunately, doesn't exist anymore.

If you're asking about humans and not cats, I'd have to say a lovely little Proboards forum called [url=http://zolbana.freeforums.net/]Zolbana[/url]. Amazingly small community, and it's sort of dead now, but I'm attempting to resurrect it. I admit I had a short bout with the infamous Chickensmoothie, but I got over that and came over here.