unity is yet broken and incomplete there are to many flaws to call it even a editor. For example there is not yet a selection box (is comming though in the next version). Mac and winows version are to different (you can't write editor script panels under the mac version) and the most irritating thing is that you can't…
Here's a great list of game engines, just google any of these for more info: http://en.wikipedia.org/wiki/List_of_game_engines If you want an easy 3D editor, Unity is about as easy as it gets. You could also look into UDK or even start taking a look at some of the basic XNA tutorials - while both of those options are going…
I've put a fair amount of research into this in the past. Unfortunately, there is little to no method of creating games for someone who doesn't want to do any programming. Programming is going to be required at some point. With that in mind... Z-Game Editor - This is a very small, basic game development software package…
Surely Unity is your best bet, although I'm pretty sure you'll need to be a fairly competent programmer. I don't know of any engines where you can put something together with no programming knowledge.