TileMill is a tool for cartographers to quickly and easily design maps for the web using custom data. It is built on the powerful open-source map rendering library Mapnik – the same software OpenStreetMap and MapQuest use to make some of their maps. TileMill enables you to load data from a wide range of sources to and then to orderand layer your sources to build complex maps. Compatible data sources include ESRI Shapefile, KML, GeoJSON, GeoTIFF, PostGIS, CSV, and SQLite.