A new web-based Sankey tool, Sankey Flow Show, is available from German software maker THORTEC Software. It promises “attractive flow diagrams made in minutes”.
And indeed the tool is rich in features and design options: Different node elements, shadow effect for arrows (called ‘connections’), toggle constant/Sankey connections style, and customizable data input are some of the highlights.
Here is one of the Sankey diagrams produced with Sankey Flow Show. See more samples here. You can sign-up for a free trial to check it out yourself.
I have added Sankey Flow Show to the list of Sankey software.