Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
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.
Sketch - Professional digital design for Mac.
Chart.js - Easy, object oriented client side graphs for designers and developers.
Adobe Illustrator - Adobe Illustrator is a vector graphics editor.
Google Charts - Interactive charts for browsers and mobile devices.