There's another one in my house that looks exactly like this too. He's a little skinnier. I got them from Animal Rescue League Boston. I will foster them for 4-5 weeks. They are 5 week old boys born to a feral mother in my 'hood. They are very skittish still (especially the elusive one) but they are eating well.
There's a tradition in my house whenever I get a new foster cat (these two kittens are numbers 18 and 19). Here's the photo of that.