"Attractive flow diagrams made in minutes!" is the promise by Sankey Flow Show. And indeed the tool is rich in features and design options: Large shapes and icons library, graphical effects (e.g. shadow effect), toggle constant/Sankey connections style, and customizable data input are some of the highlights. You can decide whether quantities are represented by the widths of the connection lines (arrows). Sankey diagrams as well as classic flow diagrams gain a new quality with Sankey Flow Show. - Find the right line strength for all connection lines of your classic flow diagram with a single slider. Or use the separate data layer to represent the energy flow, the mass flow, or the flow of further streaming quantities in Sankey diagrams. There is a free student and test license option.