Figma - Team-based interface design, Figma lets you collaborate on designs in real time.

Sankey Diagram (csaladen) - Sankey Diagram Generator

GEES - GEES is an all-in-one AI design platform that is shaping a future where you can brainstorm, design, hand-off in one file — without changing any other tools.

SankeyDiagram.net - SankeyDiagram.net is an easy-to-use tool for generating and designing Sankey Diagrams which visualize flows and especially budgets. The entered data stays in your browser and gets processed locally so you don't have to worry about privacy.

Sketch - Professional digital design for Mac.

SankeyMATIC - There are no tools to install. There is no code to write. You do not have to sign up for anything. Just enter your data, customize the diagram to your liking, and download a finished product.