Adobe used to have an app called Fireworks that was great for non-artists. They got it when they bought Macromedia. Too bad they killed it. I hope Graphite will replace it.
I remember being excited that Photoshop was going to start to work more like fireworks when they bought it. What a naive dummy I was.
Graphite looks like it could become the jack-of-all-trades app, since its foundation looks very flexible (i.e. the node graph). But, it is in its early development phase and adding necessary features is going to take many years.