Google Charts - Interactive charts for browsers and mobile devices.
AnyChart - Award-winning JavaScript charting library & Qlik Sense extensions from a global leader in data visualization! Loved by thousands of happy customers, including over 75% of Fortune 500 companies & over half of the top 1000 software vendors worldwide.
ZingChart - ZingChart is a fast, modern, powerful JavaScript charting library for building animated, interactive charts and graphs. Bring on the big data!
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
Excel Dashboard School - Free Excel add-ins and tools on Excel Dashboard School. Boost your work productivity and save your time! No trials, 100% power!
ChartBlocks - Import data, design and share a chart in minutes. Or seconds via the API.