Bézier Curve Generator (100% pen)
A bézier curve is a mathematical curve with a start point, an end point, and one or more control points that determine the shape of the curve.
Press n to create each point. The point will be created where the mouse pointer is. Press m whilst hovering over a point to delete it. The points can be dragged, though with more than about 12 points this is extremely laggy. Press space to show and hide the points.