I have a nifty little gadget by Prym called Parallel tracing wheel – I still have the packaging and the number on the top left of the card is 610 943.
The diagram on the card shows a pattern that has no seam allowance, and with this gadget there is a chalk filled container that looks like a flattened egg, and in the pointed end there is a very fine serrated metal wheel, then there is another piece that fastens on that has a moveable part so you can choose the width of the seam allowance you want between 1.5cm – 2.5cm so part of this follows the edge of your pattern paper or card and then the part with the chalk draws a line on your fabric. Quite expensive from what I recall, and have just looked on Amazon and there is a clear photo of the product. There is an extra part that goes over the flattened egg part to stop the chalk from coming out.
Obviously if you wanted to mark your stitching line once the fabric has been cut out, then you just turn it around so that the serrated wheel will draw a chalk line where you want it to be.
Hope this helps.