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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.
Montecarlito - MonteCarlito is a free Excel-add-in to do Monte-Carlo-simulations.
Chart.js - Easy, object oriented client side graphs for designers and developers.
datarobot - Become an AI-Driven Enterprise with Automated Machine Learning
Google Charts - Interactive charts for browsers and mobile devices.