An open source project to display charts on your website. Chart.js is responsive, with a great rendering performance across all modern browsers.
The framework is downloadable here on GitHub. Technical documentation is here.
Chart.js is perfect for small projects, when you need clean, elegant, fast and responsive javascript charts. It is a light open source library at just 11kb when minified and zipped. It includes 8 core chart types, with some animation features.

An html5 open source dashboard framework. It's a mature solution with many features and well documented. Here the main features:

Complete set of dashboard elements
Includes all the components that you need to build dashboards in a single package.

Light and Fast
Built with mobile devices in mind, RazorFlow Dashboard Framework is engineered for the fastest load times.

Full-featured charting
Supports Industry-Standard Column, Pie, Bar, Line charts and more.

Real-time updates
Dashboards can be updated in real-time without having to reload the page, and are compatible with web sockets.

Powerful theme-builder
The theme-builder allows you to change the look of your dashboard in just a few clicks.

Built for touch
All dashboards work great on touch devices like smartphones and tablets, with no extra work.

Server-side wrappers
Build complete interactive dashboards in PHP with no JavaScript or HTML coding required.

Embed and integrate
Embed dashboards into existing pages and web applications, and integrate fully using a JavaScript API.

Razorflow has a well-designed set of APIs to build your first HTML5 dashboard in under an hour, which works across platforms and devices. A comprehensive documentation, pre-build dashboards and an extensive feature gallery help you get started fast.
More details here. The source code can be downloaded for free here.