What is CartoDB?
CartoDB is a cloud based mapping, analysis and visualization engine that lets users build spatial applications for both mobile and the web. CartoDB was launched in April 2012 and version 2.0 rolled out in November 2012.
The platform is already being used by major news organizations, research institutions, non-profits, and geospatial application developers the world throughout.
For web or print use, available in two flavors (for light and dark backgrounds use) as well as vectorial and raster.
Use as you wish, but please be nice with it :-).
Kudos to @laszlito_k Has been a pleasure to work with him on this!