sailcutsailcut 
The latest version of sailcut is 1.3 on Mac Informer. It is a perfect match for 3D Modeling in the Design & Photo category.
Sailcut CAD is a powerful sail design and plotting software that lets you design and visualise your own sail with professional precision. It helps you compute the accurate development of all panels in flat sheets, making it ideal for yacht owners, boat builders, and marine professionals who need reliable sail planning tools.
This intuitive sailing CAD tool supports detailed sailmaking, fast prototyping, and efficient workflow for both beginners and experts. With a focus on accurate sail panel layout, 3D sail visualisation, and marine design software performance, Sailcut CAD delivers smooth, precise results for every project.
You can download both source code and binary releases from the Sailcut CAD download page and start creating custom sails using lightweight, accurate, and flexible sail design software.