ulead video studio, I was using that many years ago but I remember it was quite simple and final effect was pretty good. But like I said it was a few years ago maybe now you can find a lot more better programs than that . But try maybe you will like it
Since you don't wanna use movie maker I'd recommend sony vegas although it's not that simple but it's the only 1 I know XD Maybe Premiere is easier. If you have a mac my any chance you can use iMovie it's really simple and a good program but it's only for mac..
Simple? I don't really know what I could define as simple, but I can suggest you to use 'final cut express' if you have mac. Maybe it's not so simple the first time you use it (as most softwares in general) but it's intuitive. For personal experience, I've been using it for a year two years ago and I found it so interessing.