Sisense - The BI & Dashboard Software to handle multiple, large data sets.
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.
Looker - Looker makes it easy for analysts to create and curate custom data experiences—so everyone in the business can explore the data that matters to them, in the context that makes it truly meaningful.
Chart.js - Easy, object oriented client side graphs for designers and developers.
Exago - Embedded BI for SaaS
Google Charts - Interactive charts for browsers and mobile devices.