http://bit.ly/1b7E2O7
TransMapper is a light web mapping application targeting 'big' census data. It is developed using 6 Javascript libraries: d3.v2.min.js , cartogram.js , natural.js , topojson.js , jquery-1.10.2.min.js and colorbrewer.js.
TransMapper aims to transform the way of mapping by providing a cartogram-based visualizer and a simple natural language interface for filtering a many attributes.