I made this video a while, but @PrettyStitch was asking about it earlier. I use Leathercraft CAD is a free CAD software specifically designed for leathercraft pattern drawing. It’s being developed by a single developer out of Japan – Luthier TN – I encourage you to visit his channel on YouTube to learn more about how to use the software. https://www.youtube.com/watch?v=Q1Hb_7nwHD4

If you’re wanting to download the software, you can get it here: https://coffee-craft.net/en/leathercraft_cad