CanvasJS is an HTML5 & JavaScript based Charting Library that runs on all modern devices including iPhone, Android, Desktops, etc.

Highcharts is a charting library written in pure JavaScript.

RAWGraphs allows you to export visualizations as vector (SVG) or raster (PNG) images and embed them into your web page.

Plotly lets users easily create interactive charts and dashboards to share online with their audience.

NVD3 re-usable charts for d3.js.