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.
Invoca - Call tracking & analytics software
Chart.js - Easy, object oriented client side graphs for designers and developers.
CallTrackingMetrics - Know who is calling and how they found you. Maximize the return on your advertising.
Google Charts - Interactive charts for browsers and mobile devices.
Marchex - Marchex is a mobile advertising analytics company that connects online behavior to real-world, offline actions.