Easy curve tool

I would like the ability to make smart and easy curves with the pen tool. In Expression 3 this is called a B-spline tool. In Serif Draw Plus It's called a Smart tool which applies a curve for you. In Xara you have the Shape Editor tool which will draw a curve line or straight line(just press c or l).  These are all great for cartooning and I don't have to spend as much time node editing.