What charting technology is being used on nextbigsound.com?

It's looks like they are us开发者_如何学编程ing an all javascript based solution.

Are they using a package out there are did they roll their own solution?

Hey! Samir from Next Big Sound here, we are indeed using a custom implementation raphaeljs. This tutorial is great: http://raphaeljs.com/analytics.html

Looks like they are using a custom implementation of raphael.