Dynamic Mockups - Create Realistic Mockups at Scale
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.
Placeit - Generate realistic product shots in seconds
Chart.js - Easy, object oriented client side graphs for designers and developers.
Smartmockups - Create stunning product mockups, easily and online.
Google Charts - Interactive charts for browsers and mobile devices.