A Great Open-Source Visualizing Framework: RawGraphs.io
The Density Design Research Lab of Politecnico Milano has created a wonderful library for providing interactive visualizations. My favorite graph among numerous kinds of graphs is probably the Alluvial graph, which ensures to track the changes in the defined categories. Its difference from the popular Sankey diagram is that in Alluvial graphs, you don’t have to link your data to a new category; instead, you may link the source category to the same category as well. In fact, it is a feature that is not existing in Plotly.
If you want, you can clone the GitHub project of RawGraphs very easily, and then you may benefit from its features from your own local web server.
Below is one of my latest visualization which shows a change in pattern of two categories.