If you are a professional designer, Illustrator is the gold standard. It is not free (nor cheap), but it runs perfectly on Windows.

Price: Free
Platform: Windows, Mac, Linux

Krita is famous as a painting app, but its vector tools have improved dramatically. It uses a unique “vector layer” system that behaves more like Illustrator than Vectornator.

Standout features:

Best for: Comic artists and concept artists who need both vector lines and raster textures.

These features are usually reserved for expensive software. Seeing them offered for free on macOS/iPadOS creates serious software envy.