RapidDrawing is an outline sketch program that enables you to create the shape of a curve you want more precisely than exisitng methods. It has four control points as opposed to two, which gives you more control to create the shape of the curve.
An interactive IFS Fractal generator focused on the "Collage Theorem", IFS Lab allows the user to sketch an approximate outline of the desired fractal, then cover it with transformed images of itself to build a collage.