UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
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.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
Moqups - The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project
Chart.js - Easy, object oriented client side graphs for designers and developers.