Forio Contour is a new JavaScript library that provides an easy-to-use set of common visualizations, plus a framework for extending them. Contour is a free and open source library based on D3, with high quality documentation and easy-to-follow examples. Contour is fast, able to display thousands of points in milliseconds, and designed for sophisticated data visualizations and dashboards.

Watch the Contour Visualization Basics webinar, with presenters Jaime del Palacio and Michael Bean: