Sankey Diagram (csaladen) - Sankey Diagram Generator
D3.js - D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS.
Sankey Diagram - Professional drawing tool to create Sankey Diagrams.
Chart.js - Easy, object oriented client side graphs for designers and developers.
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.
Google Charts - Interactive charts for browsers and mobile devices.