digital maps

GeoNames

A global geographical database that may be used to identify and tag all references to location. The database contains over 8 million entries, each of which possesses a geographic name (in various languages), latitude, longitude, elevation, population, administrative subdivision and postal codes and information on unique features.
Features:
Built upon web service, enabling transparent look-up and use of content through third-party tools and sites
Browse by geographic location, country name, size of geographic region and other categories.
Full text search support

TileMill

Open source map design studio for creating and styling web tile maps, based on either provided free MapBox Geodata, or data imported as a variety of file formats. It uses the CartoCSS styling language to customize interactive visualizations, with powerful control of symbols, zoom levels, labels, and other cartographic details. The finished maps can be exported either as images or tiled web maps. Though the TileMill software is free, there may be a fee to host the created tiles on MapBox or elsewhere.