Crazy psycho killer cats

The cats. Oh, where to begin. The cats are in my house. I received them from coworkers who had rescued them. That was oh so nice. But, the cats aren't exactly super people-friendly. In fact they still hiss at me when I start to get close and then run away if they can. I've held them all a few times but they are still hissy. They eat really well though, I feel like I'm trying to fill up the bottomless well of cat hunger. Not only do I have these three cats in my house, there are two outside that have a habit of jumping up to sit in the window on the outside. So I've been feeding them a little. They seem to be tamer than the ones I have inside. I'm sure crazy-cat-lady-dom is not far away.