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.
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
Chart.js - Easy, object oriented client side graphs for designers and developers.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Google Charts - Interactive charts for browsers and mobile devices.
Marketo - Marketo's powerful marketing automation software helps marketers master the art & science of digital marketing to engage customers and prospects.