Cockatoo is a prototypical open-source software toolkit for generating (3d-)knitting patterns from NURBS surface and mesh geometry directly inside Grasshopper.

XCurve is a Implementing nurbs modeling on qt.

Simple & interactive NURBS-surfaces visualization app on OpenGL

Facade tessellation component designed for Grasshopper for Rhino; inspired by Koolhaas' Seattle Library; used for Environmental and Technical Studies "Singular Artefacts" at the Architectural Association

A freeform surface viewer based on Polyscope and geometry-central

A simple CAD design of a marker