Sankey Diagram - Professional drawing tool to create Sankey Diagrams.
Mind Map by RealtimeBoard - More than your average mind map
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.
Platforma Flowcharts - Collection of cards for website and app prototyping
e!Sankey - Die professionelle & vielseitige Software zum Zeichnen von Sankey-Diagrammen ➠ Visualisierung Ihrer Energie- & Materialflüsse ➠ Mit Verknüpfung zu MS Excel.
Wireflow - Create beautiful flowcharts